first round of collision layers

just replaced the tiles, no testing yet
Almost there
the last levels

every level now has collision tiles
Merge remote-tracking branch 'CalebJohn/tile_collisions' into tile_collisions

# Please enter a commit message to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
#
# Lines starting with '#' will be ignored, and an empty message aborts
# the commit.
random fixes
whoops forgot one
Merge pull request #7 from 8bitgentleman/tile_collisions

Tile collisions in all levels