diff --git a/build/Gruntfile.coffee b/build/Gruntfile.coffee
index 720924a09..cdca7392a 100644
--- a/build/Gruntfile.coffee
+++ b/build/Gruntfile.coffee
@@ -29,6 +29,7 @@ module.exports = (grunt) ->
   grunt.loadNpmTasks('grunt-markdown')
   grunt.loadNpmTasks('grunt-shell')
   grunt.loadNpmTasks('grunt-download-atom-shell')
+  grunt.loadNpmTasks('grunt-peg')
   grunt.loadTasks('tasks')
 
   # This allows all subsequent paths to the relative to the root of the repo
@@ -106,6 +107,13 @@ module.exports = (grunt) ->
       dest: appDir
       ext: '.json'
 
+  pegConfig =
+    glob_to_multiple:
+      expand: true
+      src: ['src/**/*.pegjs']
+      dest: appDir
+      ext: '.js'
+
   for child in fs.readdirSync('node_modules') when child isnt '.bin'
     directory = path.join('node_modules', child)
     {engines, theme} = grunt.file.readJSON(path.join(directory, 'package.json'))
@@ -114,6 +122,7 @@ module.exports = (grunt) ->
       lessConfig.glob_to_multiple.src.push("#{directory}/**/*.less")
       prebuildLessConfig.src.push("#{directory}/**/*.less") unless theme
       csonConfig.glob_to_multiple.src.push("#{directory}/**/*.cson")
+      pegConfig.glob_to_multiple.src.push("#{directory}/**/*.pegjs")
 
   grunt.initConfig
     pkg: grunt.file.readJSON('package.json')
@@ -128,6 +137,8 @@ module.exports = (grunt) ->
 
     cson: csonConfig
 
+    peg: pegConfig
+
     coffeelint:
       options:
         no_empty_param_list:
@@ -211,10 +222,10 @@ module.exports = (grunt) ->
           stderr: false
           failOnError: false
 
-  grunt.registerTask('compile', ['coffee', 'prebuild-less', 'cson'])
+  grunt.registerTask('compile', ['coffee', 'prebuild-less', 'cson', 'peg'])
   grunt.registerTask('lint', ['coffeelint', 'csslint', 'lesslint'])
   grunt.registerTask('test', ['shell:kill-atom', 'run-specs'])
-  grunt.registerTask('ci', ['download-atom-shell', 'build', 'set-development-version', 'lint', 'test', 'publish-build'])
+  grunt.registerTask('ci', ['output-disk-space', 'download-atom-shell', 'build', 'set-development-version', 'lint', 'test', 'publish-build'])
   grunt.registerTask('deploy', ['partial-clean', 'download-atom-shell', 'build', 'codesign'])
   grunt.registerTask('docs', ['markdown:guides', 'build-docs'])
   grunt.registerTask('default', ['download-atom-shell', 'build', 'set-development-version', 'install'])
diff --git a/build/package.json b/build/package.json
index 5baf8e732..6961520fd 100644
--- a/build/package.json
+++ b/build/package.json
@@ -29,6 +29,7 @@
     "rimraf": "~2.2.2",
     "unzip": "~0.1.9",
     "vm-compatibility-layer": "~0.1.0",
-    "walkdir": "0.0.7"
+    "walkdir": "0.0.7",
+    "grunt-peg": "~1.1.0"
   }
 }
diff --git a/build/tasks/output-disk-space.coffee b/build/tasks/output-disk-space.coffee
new file mode 100644
index 000000000..372ead672
--- /dev/null
+++ b/build/tasks/output-disk-space.coffee
@@ -0,0 +1,25 @@
+module.exports = (grunt) ->
+  {spawn} = require('./task-helpers')(grunt)
+
+  grunt.registerTask 'output-disk-space', 'Print diskspace available', ->
+    return unless process.platform is 'darwin'
+
+    done = @async()
+
+    cmd = 'df'
+    args = ['-Hl']
+    spawn {cmd, args}, (error, result, code) ->
+      return done(error) if error?
+
+      lines = result.stdout.split("\n")
+
+      for line in lines[1..]
+        [filesystem, size, used, avail, capacity, extra] = line.split(/\s+/)
+        capacity = parseInt(capacity)
+
+        if capacity > 90
+          grunt.log.error("#{filesystem} is at #{capacity}% capacity!")
+        else if capacity > 80
+          grunt.log.ok("#{filesystem} is at #{capacity}% capacity.")
+
+      done()
diff --git a/build/tasks/task-helpers.coffee b/build/tasks/task-helpers.coffee
index 4362393d0..f83430884 100644
--- a/build/tasks/task-helpers.coffee
+++ b/build/tasks/task-helpers.coffee
@@ -39,7 +39,7 @@ module.exports = (grunt) ->
     proc = childProcess.spawn(options.cmd, options.args, options.opts)
     proc.stdout.on 'data', (data) -> stdout.push(data.toString())
     proc.stderr.on 'data', (data) -> stderr.push(data.toString())
-    proc.on 'exit', (exitCode, signal) ->
+    proc.on 'close', (exitCode, signal) ->
       error = new Error(signal) if exitCode != 0
       results = {stderr: stderr.join(''), stdout: stdout.join(''), code: exitCode}
       grunt.log.error results.stderr if exitCode != 0
diff --git a/package.json b/package.json
index 852518566..743b79747 100644
--- a/package.json
+++ b/package.json
@@ -24,10 +24,10 @@
     "coffee-script": "1.6.3",
     "coffeestack": "0.6.0",
     "emissary": "0.19.0",
-    "first-mate": "0.13.0",
+    "first-mate": "0.17.0",
     "fs-plus": "0.14.0",
     "fstream": "0.1.24",
-    "fuzzaldrin": "0.5.0",
+    "fuzzaldrin": "0.6.0",
     "git-utils": "0.30.0",
     "guid": "0.0.10",
     "jasmine-focused": "~0.15.0",
@@ -41,7 +41,7 @@
     "oniguruma": "0.26.0",
     "optimist": "0.4.0",
     "pathwatcher": "0.13.0",
-    "pegjs": "0.7.0",
+    "pegjs": "0.8.0",
     "q": "0.9.7",
     "scandal": "0.11.0",
     "season": "0.14.0",
@@ -49,9 +49,9 @@
     "space-pen": "3.0.3",
     "temp": "0.5.0",
     "text-buffer": "0.12.0",
+    "theorist": "~0.7.0",
     "underscore-plus": "0.6.1",
-    "vm-compatibility-layer": "0.1.0",
-    "theorist": "~0.7.0"
+    "vm-compatibility-layer": "0.1.0"
   },
   "packageDependencies": {
     "atom-dark-syntax": "0.10.0",
@@ -65,16 +65,16 @@
     "autocomplete": "0.19.0",
     "autoflow": "0.11.0",
     "autosave": "0.10.0",
-    "background-tips": "0.3.0",
+    "background-tips": "0.4.0",
     "bookmarks": "0.15.0",
     "bracket-matcher": "0.16.0",
     "command-logger": "0.9.0",
     "command-palette": "0.14.0",
     "dev-live-reload": "0.22.0",
     "editor-stats": "0.12.0",
-    "exception-reporting": "0.9.0",
+    "exception-reporting": "0.11.0",
     "feedback": "0.22.0",
-    "find-and-replace": "0.68.0",
+    "find-and-replace": "0.73.0",
     "fuzzy-finder": "0.30.0",
     "gists": "0.14.0",
     "git-diff": "0.21.0",
@@ -83,21 +83,21 @@
     "grammar-selector": "0.16.0",
     "image-view": "0.14.0",
     "keybinding-resolver": "0.8.0",
-    "markdown-preview": "0.22.0",
-    "metrics": "0.20.0",
+    "markdown-preview": "0.23.0",
+    "metrics": "0.21.0",
     "package-generator": "0.23.0",
     "release-notes": "0.15.0",
     "settings-view": "0.55.0",
-    "snippets": "0.17.0",
+    "snippets": "0.18.0",
     "spell-check": "0.19.0",
-    "status-bar": "0.30.0",
+    "status-bar": "0.31.0",
     "styleguide": "0.19.0",
     "symbols-view": "0.28.0",
     "tabs": "0.16.0",
     "terminal": "0.24.0",
     "timecop": "0.12.0",
     "to-the-hubs": "0.17.0",
-    "tree-view": "0.58.0",
+    "tree-view": "0.59.0",
     "visual-bell": "0.6.0",
     "welcome": "0.4.0",
     "whitespace": "0.10.0",
diff --git a/src/atom-package.coffee b/src/atom-package.coffee
index aa62359e9..6546945bb 100644
--- a/src/atom-package.coffee
+++ b/src/atom-package.coffee
@@ -52,12 +52,6 @@ class AtomPackage extends Package
         console.warn "Failed to load package named '#{@name}'", e.stack ? e
     this
 
-  enable: ->
-    atom.config.removeAtKeyPath('core.disabledPackages', @metadata.name)
-
-  disable: ->
-    atom.config.pushAtKeyPath('core.disabledPackages', @metadata.name)
-
   reset: ->
     @stylesheets = []
     @keymaps = []
diff --git a/src/browser/atom-application.coffee b/src/browser/atom-application.coffee
index 3e9aacc18..fa18a59c1 100644
--- a/src/browser/atom-application.coffee
+++ b/src/browser/atom-application.coffee
@@ -52,6 +52,8 @@ class AtomApplication
   resourcePath: null
   version: null
 
+  exit: (status) -> app.exit(status)
+
   constructor: (options) ->
     {@resourcePath, @version, @devMode} = options
     global.atomApplication = this
diff --git a/src/browser/atom-window.coffee b/src/browser/atom-window.coffee
index 9a15c251b..0f09bfaa4 100644
--- a/src/browser/atom-window.coffee
+++ b/src/browser/atom-window.coffee
@@ -18,7 +18,7 @@ class AtomWindow
   isSpec: null
 
   constructor: (settings={}) ->
-    {@resourcePath, pathToOpen, initialLine, @isSpec} = settings
+    {@resourcePath, pathToOpen, initialLine, @isSpec, @exitWhenDone} = settings
     global.atomApplication.addWindow(this)
 
     @setupNodePath(@resourcePath)
@@ -82,7 +82,7 @@ class AtomWindow
       @browserWindow.destroy() if chosen is 0
 
     @browserWindow.on 'crashed', =>
-      atom.exit(100) if @isSpec
+      global.atomApplication.exit(100) if @exitWhenDone
 
       chosen = dialog.showMessageBox @browserWindow,
         type: 'warning'
diff --git a/src/display-buffer-marker.coffee b/src/display-buffer-marker.coffee
index 1bbd6633e..8c08b3c9e 100644
--- a/src/display-buffer-marker.coffee
+++ b/src/display-buffer-marker.coffee
@@ -168,7 +168,7 @@ class DisplayBufferMarker
 
   # Returns a {String} representation of the marker
   inspect: ->
-    "DisplayBufferMarker(id: #{@id}, bufferRange: #{@getBufferRange().inspect()})"
+    "DisplayBufferMarker(id: #{@id}, bufferRange: #{@getBufferRange()})"
 
   ### Internal ###
 
diff --git a/src/key-binding.coffee b/src/key-binding.coffee
index 11b4505d0..1f3ad1d65 100644
--- a/src/key-binding.coffee
+++ b/src/key-binding.coffee
@@ -1,8 +1,6 @@
-{$} = require './space-pen-extensions'
 _ = require 'underscore-plus'
 fs = require 'fs-plus'
 {specificity} = require 'clear-cut'
-PEG = require 'pegjs'
 
 ### Internal ###
 
@@ -10,28 +8,41 @@ module.exports =
 class KeyBinding
   @parser: null
   @currentIndex: 1
+  @specificities: null
+
+  @calculateSpecificity: (selector) ->
+    @specificities ?= {}
+    value = @specificities[selector]
+    unless value?
+      value = specificity(selector)
+      @specificities[selector] = value
+    value
 
   @normalizeKeystroke: (keystroke) ->
     normalizedKeystroke = keystroke.split(/\s+/).map (keystroke) =>
-      keys = @getParser().parse(keystroke)
+      keys = @parseKeystroke(keystroke)
       modifiers = keys[0...-1]
       modifiers.sort()
       [modifiers..., _.last(keys)].join('-')
     normalizedKeystroke.join(' ')
 
-  @getParser: ->
-    if not KeyBinding.parser
-      keystrokePattern = fs.readFileSync(require.resolve('./keystroke-pattern.pegjs'), 'utf8')
-      KeyBinding.parser = PEG.buildParser(keystrokePattern)
+  @parseKeystroke: (keystroke) ->
+    unless @parser?
+      try
+        @parser = require './keystroke-pattern'
+      catch
+        keystrokePattern = fs.readFileSync(require.resolve('./keystroke-pattern.pegjs'), 'utf8')
+        PEG = require 'pegjs'
+        @parser = PEG.buildParser(keystrokePattern)
 
-    KeyBinding.parser
+    @parser.parse(keystroke)
 
   constructor: (source, command, keystroke, selector) ->
     @source = source
     @command = command
     @keystroke = KeyBinding.normalizeKeystroke(keystroke)
     @selector = selector.replace(/!important/g, '')
-    @specificity = specificity(selector)
+    @specificity = KeyBinding.calculateSpecificity(selector)
     @index = KeyBinding.currentIndex++
 
   matches: (keystroke) ->
diff --git a/src/package.coffee b/src/package.coffee
index 4d8112466..f7dac9ffe 100644
--- a/src/package.coffee
+++ b/src/package.coffee
@@ -47,6 +47,12 @@ class Package
   isActive: ->
     atom.packages.isPackageActive(@name)
 
+  enable: ->
+    atom.config.removeAtKeyPath('core.disabledPackages', @metadata.name)
+
+  disable: ->
+    atom.config.pushAtKeyPath('core.disabledPackages', @metadata.name)
+
   isTheme: ->
     !!@metadata?.theme
 
diff --git a/src/pane-container.coffee b/src/pane-container.coffee
index 4ecda8359..7f9bd44f7 100644
--- a/src/pane-container.coffee
+++ b/src/pane-container.coffee
@@ -66,7 +66,7 @@ class PaneContainer extends View
     panes[nextIndex].makeActive()
 
   itemDestroyed: (item) ->
-    @trigger 'item-destroyed', item
+    @trigger 'item-destroyed', [item]
 
   getRoot: ->
     @children().first().view()
diff --git a/src/project.coffee b/src/project.coffee
index 7a32a933e..333f5c7bc 100644
--- a/src/project.coffee
+++ b/src/project.coffee
@@ -300,7 +300,7 @@ class Project extends Model
     promise = deferred.promise
     promise.cancel = ->
       task.terminate()
-      deferred.reject('cancelled')
+      deferred.resolve('cancelled')
     promise
 
   # Public: Performs a replace across all the specified files in the project.
diff --git a/src/task.coffee b/src/task.coffee
index de8d3de10..80eaa81b8 100644
--- a/src/task.coffee
+++ b/src/task.coffee
@@ -91,6 +91,7 @@ class Task
   # * message:
   #   The message to send
   send: (message) ->
+    throw new Error("Cannot send message to terminated process") unless @childProcess?
     @childProcess.send(message)
 
   # Public: Forcefully stop the running task.