New Map Generator Options

Do play around with the different terrain styles. If you find that there is a kind of water map that is lacking we can maybe add it as a new terrain style.

A new alpha was just released that adds reclaim and resource density options for custom styles

Excellent idea with the bounded sliders.

Using random Biome & Terrain options, it seems I'm getting a much more diverse (and playable) set of maps than I was before. So a nice improvement.