Remove reference to therubyracer from README.md 

therubyracer doesn't currently work to build ember.js, and this patch removes an instruction to use it.
Move Ember.Application docs into one place so YUIdoc doesn't lose half of it
Merge pull request #2130 from CrowdStrike/doc

Move Ember.Application docs into one place so YUIdoc doesn't lose half of it
Controllers are unwrapped

When a controller is passed to {{action}}, its
model is passed to the target
Move resolution logic to shared file
Unwrap controllers passed to {{linkTo}}
lastObject should not raise exceptions on empty arrayControllers

It fix an error introduced in c97a01947ea05654121cc8211908375637e4a7ac
Merge pull request #2142 from tchak/array-controller-fix

failing test with default arrayController content
Fix two linkTo unit tests that fail in IE9.  Tests used an <a> tag inside of a <button> tag, which IE9 does not like but works in other browsers.  Example: http://jsbin.com/ozemig/1/edit
Normalize controller lookup, fix #2025
Merge pull request #2145 from craigteegarden/ie9-linkTo-test-fix

Fix two linkTo unit tests that fail in IE9.  Tests used an <a> tag insid...
Merge pull request #2131 from darthdeus/normalize-controller-lookup

Normalize controller lookup, fix #2025
Reuse path variable
Refactor normalization
Merge pull request #2152 from darthdeus/fix-normalization

Refactor normalization
Merge pull request #2151 from caligo-mentis/reuse_variable

Reuse path variable in Ember.HashLocation
Use ENV var to disable version logging of used libraries
Merge pull request #2090 from regularfry/master

Patch to avoid bumping into issue #2069
object proxy defines properties that are passed to create that do not exist in the prototype
expose RSVP on the ember namespace