Added Flaxbeard's Steam Power example configs; updated Forestry example configs.

Created example configs for Flaxbeard's Steam Power mod.
![](http://i.imgur.com/9DHpTXU.png)

Updated example configs for Forestry to work with Forestry 3.0+. 
(because of this) https://github.com/ForestryMC/ForestryMC/commit/83789ae8f726631aa435dcb6d445cbcc2b0c4e65