Update 0.1.1

0.1.1 updates:

   - bots without base scenes now have one
   - float to int conversion on hp, shield and damage values
   - navpoly's get_new_path and enemy/master distance calculation now executes on the same tick
   - some improvements on state machines
   - projectile behavior tree branch now an intstantiable saved scene
   - tilemap sprites in a single image file
   - removed some doors to prevent getting stuck
   - other small fixes and changes