Adding temperature and rainfail values to 1.7.x biomes.

The existing support for the 1.7.x biomes does not affect the color of grass and leaves when they are rendered. I took the temperature and rainfall data from minecraft 1.7.10 and added them to the newer biomes so that they will tint the flora appropriately.

Savanna biome before (Dynmap Forge 2.0.0):
![dynmap-2 0 0](https://cloud.githubusercontent.com/assets/62613/5422778/6606da42-824a-11e4-8434-1b1f68d9aea4.png)

Savanna biome with Dynmap Forge 2.1.0-alpha-1 with my patch:
![dynamp-2 1-new](https://cloud.githubusercontent.com/assets/62613/5422779/70e00074-824a-11e4-9388-0b80fff14c8e.png)