Texture updates match skin colors/style

New smaller (file size) and matching color/styles to skin.

*OSDProgress/Back/Mid/Light which covers all UI volume/progress bars
*ScrollbarH/H_bar/H_bar_focus which covers all Horizontal scrollbars
*ScrollbarV/V_bar/V_bar_focus which covers all Vertical scrollbars
*Floor Which covers main menu and other views (is same texture as when
pulling osd it improves visibility of background and improves matching
style.

A Textures.xbt for testing if anyone wants, https://github.com/uNiversaI/Test/raw/master/Textures.xbt
Merge branch 'master' of https://github.com/uNiversaI/xbmc