Updating Node.js version to 0.10.21.
Merge pull request #1 from jmervine/master

Updating Node.js version to 0.10.21.
Update the manifest after a documentation is generated
Update Less documentation to 1.5.0
Update Ember.js documentation to 1.1.2
Add comment about applicationCache not supporting CORS
Refactor docs.thor
Add docs:clean task for deleting documentation packages