moved player movement to keyInput func, renamed it to movePlayer, added friction, renamed old friction to drag, added borders, fixed stuff
added debug functionality to change framerate
enemy spawns from random position and difficulty affects to spawn speed
easteregg added
divided shield into some functions, fixed delta time issues, fixed normalize
Merge remote-tracking branch 'origin/master' into esko
Merge branch 'esko'
collision logic added to playstate
Fixed compile error
Merge branch 'master' into joona

Conflicts:
	include/LD30/Entity/Player.hpp
	src/LD30/Entity/Player.cpp