tile and map package restructure fix; load data file
data saving prelim
Merge branch 'test' of https://github.com/thomas4g/2340 into test

Conflicts:
	src/edu/gatech/mule/fx/screens/views/main/FXPersistenceView.java
	src/edu/gatech/mule/screen/screens/controllers/main/PersistenceController.java