Update Nr. 101 | Changes and new parts

- Changed the Buttons for the categories at the bottom to make more categories for planned future content possible - Added a new category "Inventory" - Added a new Overview for the Steam inventory items (monsters). (No ingame effect yet) - Doubled the drop rate of halloween items for the last days - halfed needed HW for increase of speed and dmg - Changed the Event activation system for future events - added new ingame graphics for all monster steam inventory items - added several new scripts for ingaem functions and calculations