Added Overworld, more bricks, door images
Added prefabs
-Added lighting system
--Spawn a LightPoint and give some light!
-Added HUD message function (Display a message on the HUD for a few seconds)
-Made some more adjustments and cleanup
-Added a few of Alex's tiles to map generation
--Had to adjust character sizes and colliders because these tiles are smaller
-Still working on some stuff, such as stuck wall normal glitch
Merge branch 'dev' into james-dev