Added package: configuration
Added ConfigurationSettings and Configuration Handler for Configuration of Mod a la EE3.
Added package: WorldGen
Added FloatingIslandGenerator and GeneratorCommon for Island Generation. Does not currently generate an island, just a framework with some working components.

The current plan is to implement X different Generators to generate X different Island types. Later I may switch  to 1 central World Generator which then simple calls different Generator functions, much like the previous implementation.