More Additions

Fixes
	Show menu item
	mpv Speed
	mpv screenshot directory/templates
Changes
	Using Load/Save settings in mpv, all sets are private
	PlayState enumeration--removed Ended, numbered so >0 means video is playing
	Moved things around in mpv to make cleaner
	Added some new functions (eg. speed, subtitle visibility)
	Consolidated some other functions (subtitle scale)
	Renamed some functions (playlist related functions have postfix playlist)

note: there is a graphics bug that appeared it'll be fixed soon.