Coffeescript phase out - Stage 1 - Helper and Vapour

* Added exclusion of .coffee in plugin directory to facilitate the coffeescript phaseout
* Removed capability of adding .coffee ( save the grunt build file ) in .gitignore
* Added 2 globals [Modernizr, and yepnope] to jshint rule set
* Replaced helpers and vapour with thier .js equiv
* Modified Grunt to still allow .coffee to be in plugins, but it is not longer a commitable filetype