Switch assertion for simulated Ember.create

The object created by simulated `Ember.create` has many property.
So `deepEqual` couldn't be used for its' assertion.
Added docs of ArrayContentDidChange for array
Fix bug with Ember.Handlebars.helper

When used to create a dyanmic tag
Normalize Ember.Handlebars.helper hashes
Really normalize hash params this time
get of property in false values should return undefined
Make view helpers work with bindings
Merge pull request #2534 from Myslik/master

Added docs of ArrayContentDidChange for array
Merge pull request #2541 from teddyzeenny/false-value-get

Ember.get of any property of a false value should return undefined
Merge pull request #2528 from tricknotes/test-for-ember-create

Switch assertion for simulated Ember.create
Fix incrementProperty/decrementProperty to be able to use with 0
Merge pull request #2544 from komasayuki/increment-by-zero

Fix incrementProperty/decrementProperty to be able to use with 0