Bug 1093436 - [Stingray][Home] move libraries to tv-shared folder

The arguments `stage` and `tvShared` in `analyzeCss()`, `analyzeHtml()`, and `copyTVShared()` are pretty much staying the same in build process. Do we really need them to be passed around? 

But if you intend to expose `analyzeCss()`, `analyzeHtml()`, and `copyTVShared()` as public methods, it would be necessary to pass around `stage` and `tvShared`