Mapselector based on real files.
Modified some xml, added more category buttons to floorfragment, Changed
mapselector to be based on real files, fixed so cant add with same name
as well as max map limit of 10 and delete dialog on long press.
Create/Delete of map items does not actually create/delete files yet.
Merge branch 'master' of https://github.com/QuattroX/pixel-dungeon.git

Conflicts:
	res/layout/fragment_tab.xml