Add level of detail setting to mesh

Generate forest

Create water mesh in separate thread

Create height map data and mesh data in separate threads

Add spaces in between inspector sections

Move all settings to TerrainMapGenerator class

Create serializable HydraulicErosionSettings

Create serializable ForestGeneratorSettings

Update README and do not allow chunk width of 0

Update README

Update README

Replace Height Map Generator image in README

Fix bug where seed changes each time Unity loads

Fix bug where settings are not correctly saved in inspector

Add average height map depth