WorldSim v0.0.011-dev

This release uses more stable compilation flags.
The world generator now produces repeatable output from the seed (Erase the seed to get random maps). I had to temporarily remove multithreading for biome generation.
Human Tribes will sometimes drop gems on the world. This is to showcase basic interactivity of WorldObjects on the world.
There's also a Civ menu, but it's pretty boring at the moment, it just lists the names of the Civs.