Filled in the cleanUp function for the Original Island-type generation.

The next commit should include changes to the process. THe new process should be:
1. Determin Radius and HeightBuffer for new Island as well as location.
2. "cleanUp" for the given island type, move all the decor to be on top of the island.
3. Generate Island platform.
4. ???
5. profit! [jk]

Additionally, changes need to be made to GeneratorCommon to accomodate new Generators, since some of the functions are very specific. Generator Common may be redone or completely removed.