Use clear-cut library for specificity

src/binding-set.coffee

@@ -2,7 +2,7 @@
 _ = require 'underscore-plus'
 fsUtils = require './fs-utils'
 
-Specificity = require '../vendor/specificity'
+{specificity} = require 'clear-cut'
 PEG = require 'pegjs'
 
 ### Internal ###
@@ -19,7 +19,7 @@ class BindingSet
 
   constructor: (selector, commandsByKeystrokes, @index, @name) ->
     BindingSet.parser ?= PEG.buildParser(fsUtils.read(require.resolve './keystroke-pattern.pegjs'))
-    @specificity = Specificity(selector)
+    @specificity = specificity(selector)
     @selector = selector.replace(/!important/g, '')
     @commandsByKeystrokes = @normalizeCommandsByKeystrokes(commandsByKeystrokes)
 

src/syntax.coffee

@@ -1,5 +1,5 @@
 _ = require 'underscore-plus'
-Specificity = require '../vendor/specificity'
+{specificity} = require 'clear-cut'
 {$, $$} = require './space-pen-extensions'
 fsUtils = require './fs-utils'
 {Emitter} = require 'emissary'
@@ -76,7 +76,7 @@ class Syntax
       name: name
       selector: selector,
       properties: properties,
-      specificity: Specificity(selector),
+      specificity: specificity(selector),
       index: @scopedPropertiesIndex++
     )