Initial Dir code dump.

Contains the following (in no particular order):

	Migrated to Android Studio.
	Theme changes.
	String changes.
	Different behavior on file that can't directly be opened.
	Thumbnail fixes.
	Added animations.
	Fixed tests.
	Updated minSDK to 16.
	Project structure changes.
	Changed Copy/Cut/Compress/Extract UI and created Services.
	Action changes.
	String cleanup.
	Added file observer for realtime refreshes on the visible directory.
	MediaScanner fixes.
	Added checks for storage space for copy operation.
	Hid logs behind Debuggable flag.
	Changed search (& suggestions) behavior.
	Moved bookmarks to a side pane.
	Changed generic list item icons.
	Added empty state drawables.
	Minor change on back button behavior.
	Added Select all action.
    Implemented persistent scroll positions for all paths. (retained until app exits)
	Removed dark theme.
	Removed third party actions from CAB.
	Removed dependency on OI distribution.
Added correct page url.
Corrected beta URL.
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