item and simple inventory #17
Merge branch 'dev' of https://github.com/sunriseJS/sunriseJS into dev

# By JGerdes
# Via JGerdes
* 'dev' of https://github.com/sunriseJS/sunriseJS:
  removed debug message
  changed test game
  extendend physics
  created function for dot product in Vec2
  fixed: type
  fixed calculation for collision detection AABB vs AABB
  fixed: wrong sign
  added debug-view to renderer
  collsionSolver provides additional information to collisions (normal, penetration depth)
  changed test level a bit
  small changes to statemachine