Hotfix 0.87b

Few quick fixes:

Added:
- Added a new card: Lycanthropy.

Fixed:
- Fixed: "Pray for prosperity" should work correctly now.
- Now you can pick up Caravans and Battlefields after teleporting.
- Fixed bug, that prevented (sometimes) units from spawning.
- Fixed Shield Maiden's skill.
- Fixed Time Rewind bug (occurring when time rewind was used multiple times on the same free card).

Balance:
- Invader price increase to 8 food.
- Invader ability changed to "Hits two targets".
- Invader (level 1) stats changed from 5/2/8 to 3/2/8
- Invader (level 2) stats changed from 6/3/8 to 3/2/10
- Invader (level 3) stats changed from 7/3/9 to 4/2/11
- Axeman ability changed to: "Can't counterattack".
- Axeman (level 1) stats changed from 3/1/8 to 4/2/8
- Axeman (level 2) stats changed from 3/2/9 to 5/2/9
- Axeman (level 3) stats changed from 3/2/11 to 6/2/10