First rebalancing row thanks to Danimal

Closes #288
Fixed the training dummy 4 thanks to Danimal.

Closes #287
Added the new animated boulder. You can now see the ball rolling. :)

Fixes #286
Added missing boulder skeleton file.

Sorry :S
Upgraded the mesh format of models in need of it.

Closes #213
Made sure the creatures are using reachable tiles when wandering/fleeing.

Part of #290

Most creatures are now behaving normally again...
There is still one knight stuck in Stone keep siege level in the middle of the level.
Merge pull request #291 from Bertram25/development

Several updates to models and game balance...