Changes:
- Swarm tower now attack priority targets by default
- Added the ability to go back in time default key "backspace", will go back to begining of wave or previous wave
- Added campaign map Broken mine
- Added campaign map Dump Station
- Improved damage from minigun with 5%
Bug fixes:
- Fixed crash, when loading a newly exported map for the first time
- Fixed crash, when spear did damage on its last frame
- Fixed crash, when clicking npc 2 times in 1 frame
- Fixed crash, when main menu loaded after exiting from map editor
- Fixed crash in main menu that could occure when leaving a map