xml/src: added menu button for drag/drop
src: added stubs for starting/stop of drag drop behaviour
src: small refractoring
misc: refractor
src: small refrator
xml/refractor: rename menu layout
src/refractor: added stubs for drag/drop and touch listener for drag
src: added stubs for OnDragListener
src: format code
src: refractor
xml: added new layout for drag/drop visualization, TODO make only upper line
src: working on draglistener
src: implement drag/drop, testing and refactoring required
misc: ignore generated files
misc: refractor