added grow; extra filters on nav bar; other small changes with look/feel
HomeController.cs -> Added additional filters and fixed issues w/ previous ones.

_Layout.cshtml -> Added & tested nav-bar toggles for each filter type

Created FilterESRB.cshtml & FilterPlatform.cshtml

Also changed and tested all "Filter" references to "FilterCategory"
Removed sidebar since filters on top nav bar (will try to move them to the sidebar as a pop-out menu, but no time for now); added carousel with links to different "Category" filters; reformatted bootstrap.css to make it easier to read
fixed size/alignment issues with carousel
Merge pull request #1 from lswroc01/master

added grow; extra filters on nav bar; other small changes with look/feel