New settings feature: ability to choose Auto TV Shelf episodes' theme.
1. New settings submenu under Media Shelf Customizer
2. "Toggle" button for 3 themes
3. Added TV show's banner as new property for all Latest(/Recent) Episodes in home shelf
4. Created three themes (including pre-existing one)
added shadow for banner on theme 3, better visibility
added preview images for themes in shelf settings
4th theme for shelf auto episode list
better preview picture for theme #4
major consolidation of theme elements:
1. all tv episde items in shelf moved into <include> tags, to be drag-dropped as needed in themes
2. all hover boxes (rectangles over selected item) consolidated in <include>s
Merge branch '20131229-amitk-TVShelfThemeSetting'

Conflicts:
	1080i/Includes_Shelf.xml

fixed conflict with Latest2Recent branch (previously committed)
initial mod separation (together with commit 47838c2)