Added GUI and PowerUps

+Ship selection
+Level selection
+Play/Pause/Exit to Menu
+Exit game
+Enemies have on death behavior
+PowerUps creating function
+Health and Charge PowerUps
-Level editor not integrated
-Level editor comparability reduced

Also included hardoncollider, and love frames in this commit, since
they are part of the project, though the files have not been changed.
Merge branch 'Waab's-Branch'

Conflicts:
	Archive.love
	SaveLoad.lua
	main.lua
	testlevel.lua