DSB Version 0.15

[Sophia]

What's new:

- Fixed crash when dsb_enable causes objects it is affecting to move
- Fixed crash on stairs
- Fixed bug with things falling down a pit onto a trigger
- Fixed dynamically scaled objects being wrongly x-flipped
- Fixed a bug with expiring torches
- Fixed rock's attack methods to no longer include "STAB"
- Fixed broken mana potion
- Added dsb_level_tint(RGB)
- Deprecated dsb_use_wallset in favor of dsb_level_wallset
- Added "floordamager" (does damage to anything walking on it)
- Added "func" exvar to triggers/wallitems to call arbitrary functions