Merge pull request #17 from niamu/tile_collisions

Fix some broken tests
new_collisions: remove redundant code in projectile.lua
new_collisions: fix inventory drop after master merge
new collisions: fix bat and update winterwonderland ladders
new_collisions: various fixes/tweaks
fix platform issues
fix to 2.5D
fix to half height blocks
greendale fixes 1
update to half tile fix
greendale fixes 2
other level fixes
Merge pull request #19 from edisonout/greendale_platforms

Platform and 2.5D fixes
new_collisions: more level tweaks/fixes
level platform tweaks
ladders and droppable platforms
village treeline ladders
Merge pull request #20 from edisonout/more-fixes

More fixes
new collisions: redo special tiles and fix spiders
new collisions: village-forest-2 and small baseball update