Fix victory conditions for animals
Make colonnades less common
Tweak the noise cave

now that loot can apear outside its rooms, too.
Fix a crash in item generation
Add the duel game mode
Make trees lit and bushes dark
Let the dot after Calm in UI mean no ambient light
Speed up and correct opening creation

If there is no door, we now keep the underlying corridor tile.
For all caves off rogue cave
Tweak battle and other caves
Prevent too close starting positions in battle cave
Add one more level to the safari game mode
Fix detection of leaderless faction's demise