Replace Atom::getLoadSettings with a ::loadSettings property

We assign a value into ::loadSettings anyway in a spec, so there's not
much point leaving it a method. Eventually I'd like to pass all these
settings in when constructing the Atom object and eliminate awareness
of the loadSettings altogether from the Atom global.

benchmark/benchmark-bootstrap.coffee

@@ -1,7 +1,7 @@
 require '../src/window'
 Atom = require '../src/atom'
 atom = new Atom()
-atom.show() unless atom.getLoadSettings().exitWhenDone
+atom.show() unless atom.loadSettings.exitWhenDone
 window.atom = atom
 
 {runSpecSuite} = require '../spec/jasmine-helper'

benchmark/benchmark-helper.coffee

@@ -40,7 +40,7 @@ window.benchmark = (args...) ->
     report = "#{fullname}: #{total} / #{count} = #{avg}ms"
     console.log(report)
 
-    if atom.getLoadSettings().exitWhenDone
+    if atom.loadSettings.exitWhenDone
       url = "https://github.com/_stats"
       data = [type: 'timing', metric: "atom.#{fullname}", ms: avg]
       $.ajax url,