Broforce launch update!

-Fixed background prallax and treefoliage to match the new art (it was all messed up), level 1 should look much nicer now.
-Added some new doodads to level 1 (Like Duke Nukem says: Use them if you got them!)
-Fixed background Fog in level 3 and added some new decor to make the alien part a bit less blocky.
-Enjoy!