Fix currentView when ContainerView is created with one to be parented and setup correctly.
fix build for VIEW_PRESERVES_CONTEXT=false
remove duplicate test
cleanup meta.values on unwatch
guard unknown property checks with undefined check for performance, speeds up a normal get key
Fix example js syntax in comment
Merge pull request #1167 from christophermanning/patch-1

Fix example js syntax in comment
Add tests for ternary operator in class bindings
Implement helper methods in Ember.View

The helper methods are
 - _parsePropertyPath
 - _classStringForValue
 - _classStringForPath
Add tests for Ember.View helpers
Use previously introduced Ember.View helpers in Handlebar helpers
Refactor upload_latest task to use github_downloads gem
Change ternary syntax to double colon sytax

The syntax to define class names for truthy and falsy values changed from isEnabled?enabled:disabled to isEnabled:enabled:disabled
Cleanup Ember.View#_classStringForProperty
Add documentation for double colon syntax in classNameBindings
Add some documentation to Ember.View helpers
Add more documentation
Merge pull request #1168 from pangratz/update_uploader

Refactor upload_latest task to use github_downloads gem
Fix typo
Simplify calls to Ember.Mixin.prototype.reopen in core_object so that it is clearer what is happening.