Chickens spawn in tile 0,0 and then go through everything to their hatchery
Workers can claim tiles next to a claimed wall even if no claimed ground tile neighboor
Add support to sell rooms/traps
After selecting a tile, it is not possible to pickup a creature
Merge pull request #219 from hwoarangmy/development

Add support to sell rooms/traps + chicken spawn problem
Added the Hammock for Adventurers.

Fixes #218

I also updated the credits file and fixed a few things there.
Merge pull request #222 from Bertram25/development

Added the Hammock for Adventurers.
Moved the room destroy button on the left and visually separated it from the other buttons...

This is more coherent for the player.
Did the same for traps...
Adapted the main menu to lower resolutions

The menu is still ok on higher ones...
Adapted the skirmish menu to lower resolutions

Up to 640x480...
Adapted the join game menu to lower resolutions...
Adapted the host game menu to lower resolutions...
Adapted the editor loading menu to lower resolutions...
Merge pull request #220 from oyvindln/development

Only create symlinks if they don't already exist
Merge pull request #223 from Bertram25/development

Some work on GUI