Faster Random 2.0.0

This is a major update to Faster Random. This will create visual differences between caves in Faster Random pre-2.0.0 and 2.0.0.

This release is based off of PR #21 by Steveplays. Faster Random 2.0.0 should have a boost in performance when generating terrain.

WARNING: THIS RELEASE IS BUGGED, PLEASE USE 1.6.0 UNTIL 2.1.0 RELEASES.