Corona version 2

This does some awesome updates to Corona. I am leaving it as a PR so @Snugug can review the few changes that affect the project as a whole. 

Specifically--- the .gemspec file and config.rb.erb need to be checked. I updated quickly the gem versions required so that it works. Currently, with the changes with Compass v1.0.0 and Sass 3.3+, some dependency hell is occurring. I would like to get this in as soon as possible, so I can post a blog post :-D