Fixed some warnings (mostly unused variables)
When a tile is marked to dig, if it is claimed by another team, it do not become undiggable
fixes #164
Cannons keep shooting at dead units
fixes #166
Also fixes bug where dead kobolds woke up until they disapear.
Workers can claim ennemy room
Merge pull request #173 from oyvindln/development

Dropped tinygettext, fixed application exit
Reset the creatures XP to 0 when leveling up.

This is part of the high-speed leveling problem.

Fixes #174
Merge pull request #169 from hwoarangmy/development

Small fixes : workers claim ennemy room + Cannonns keep shooting + sometimes, ennemy kobold can claim claimed walls
Merge pull request #175 from Bertram25/development

Reset the creatures XP to 0 when leveling up.
Tweaked the cannon trap damage and range.

This trap made any team or location invincible. Also, as they can't be destroyed, they are even more deadly.

Reducing their damage permits to fix part of this problem. I assume the rest will be done with #165
Merge pull request #178 from Bertram25/development

Tweaked the cannon trap damage and range.