Improved rooms generation, ground traps and more

Version 0.8.9 - more interesting dungeon layout (part 1) - items can be assigned from the inventory to the hot bar using a mouse (finally!) - ground trap introduced inside dungeons, watch out where you step - two new achievements Magic Master, God Collector - bug fixes [img]{STEAM_CLAN_IMAGE}/43165636/41cbeb5aa6e67d16652922a4edf80ce341e17945.png[/img]