Moved getters from Sounds and Rotations to GameRegistry.

This has been done as every other Class like this e.g. Blocks, Items, Environments, Biomes do not have getters. The getters for these should be in GameRegistry as they have to be registered like the above examples.
being efficient and brining the file size down by 391 bytes :P. I can change this if it is a MAJOR issue with devs?