Action helper should invoke a run loop

Fixes #2005
Test the URL for app reset
Wrap the hashchange event in an Ember.run
lazier computed properties – don't bother watching
dependencies if you don't have a cached value to
invalidate.
Merge pull request #1964 from kselden/lazy-cp

lazier computed properties WIP
Tack the raw function onto bound helpers
Don't clobber the default container
point to https rubygems
Merge pull request #2039 from cgcardona/update_gemfile

point to https rubygems
Update Gemfile.lock as well
Added test to prove 3rd code block in Guides, section "Rendering a Template"
Merge pull request #2032 from oldfartdeveloper/render_controller

Added test to prove 3rd code block in Guides, section "Rendering a Template"
Merge pull request #2042 from bradleypriest/update_gemfilelock

Update Gemfile.lock as well
Fix false redirect alarm in Router.didTransition

In some cases didTransition believed a redirect had occurred when this was not
the case. This in turn prevented currentPath from being set among other issues.
itemController should propagate target

This allows {{action}} to work when paired with
{{#each}}'s itemController option.
Add download links for VirtualBox and Vagrant
Merge pull request #2058 from mhelabs/contributing-vagrant

Add download links for VirtualBox and Vagrant
Add failing test for #2050
Fixed some API docs
Merge branch 'array-controller-with-default-array-content' of https://github.com/darthdeus/ember.js into darthdeus-array-controller-with-default-array-content