removeProp: Fix errors in code example

Fixes #604
1.11.36
Build: Replace grunt-clean with rimraf
Build: Remove unused tasks
README: Cleanup
jQuery.ajax: Remove warning about PUT and DELETE

Fixes gh-412
1.11.37
Build: Upgrade to Grunt 0.4.5

* Upgrade to grunt-check-modules 0.2.0
* Upgrade to grunt-jquery-content 1.0.0
Build: Remove dates from copyright notice
Build: package.json cleanup
1.11.38
Build: Upgrade to grunt-jquery-content 2.0.0
1.11.39