Uses joda-time-2.3.jar
Some basic group value splitting. For sharing a single transaction among groups.
Can now deal with multiple groups, e.g. one=10,two=20 or one=10,two
Added Money type and unit tests.
Added Money type.
Transaction lists and tests. "add" only so far.
Made use of Money type, replacing long.
Refactored package structure.
Add and subtract compare currencies.