made some changes to Spell constructors, refactored some stuff, and added some methods. shouldn't affect much since it's mostly new stuff and not that many changes. minor changes to MUDServer on account of refactoring. added google gson 2.2.2 to my libraries locally. added new package mud.json. added some classes for testing new spell storage format which keeps stuff in json objects. testing/impl of spell storage in json in progress.