Turned MaxHP into MinHP and made Awakeness, Hunger and HP healing configurable.

Part of #152
Added the Lizardman Bed while on it.
Neutralized a few models normal until we have them working again.
Merge pull request #237 from Bertram25/new_params

Turned MaxHP into MinHP and made Awakeness, Hunger and HP healing config...
Merge pull request #236 from Bertram25/new_models

Added the Lizardman Bed while on it.
Quick-fixed lizardman's bed name.

Prevent a useless segfault.

My apologies...
Removed a second Christian Cross in the Dungeon Siege level. ;)
Added the newest models.

I'll adapt the Credits as soon as I've got the license info for the textures.
Updated the license for the latest models
Merge pull request #241 from Bertram25/new_models

New models + small map fix.
Simplified the way Chickens are handled in the hatchery
- Chickens can be picked up
- Chickens can be dropped on claimed tiles
- Chickens leave hatchery only when dropped outside
- Chickens can live 30 turns outside the hatchery. After that, they die
- Only creatures using the hatchery will consider eating a chicken in the hatchery
- A creature not using the hatchery will consider eating chickens outside the hatchery only. Any creature, even ennemy can eat a free chicken
fixes #216
Renamed RoomObject to RenderedMovableEntity.
- Renamed RoomObject to RenderedMovableEntity
- Adapted Room/Trap/Missiles to use the same logic for construction
- Added boulder trap
- Traps now deal damage when Missile hits only (if it hits)
fixes #233
fixes #231
fixes #197