Got TreeMapReduce up and running so now we have TreeStep working with Gremlin OLAP. Oh yea. Added TinkerPop2 test cases for Tree to TP3. Added addTree() method to Tree. Added splitParents() to Tree. Added more test cases to TreeTest. Renamed variables in all the SideEffect MapReduces as they were copy/pasted all lame from one primary class. Fixed #58.