Fxing VS crash on bundle delete + cancel bundling on checkout error (#1401)

Feature: Make right-to-Left CSS variant; RTLCSS.
Addresses http://bit.ly/1sA7l9w.
Special thanks to @mohammadyounes for making
changes in rtlcss espcially for Web Essentials.

src-jshint: Now supports jshint-ignore.

Code: Misc. fixes.
Merge branch 'master' of https://github.com/scabana/WebEssentials2013