Enemy picture
Merge branch 'develop' of https://github.com/ggj/ggj14 into develop
Fix crash box2d
Fix crash delete enemy
Merge branch 'develop' of https://github.com/ggj/ggj14 into develop

Conflicts:
	resources/dungeon.json
	resources/textures/rocket_invader.png
	source/manager/guimanager.h