Added first modular classes
DataScreen implemented
Fixed the list of tracked files

It got screwed up by NetBeans git plugin, so I used bash to fix them
Finished DataScreen implementation

Added setOwner functionality; enables editing of previously created events
Created class Scrollbar, added more Handlers to mainScreen
Started merging MainScreen and DataScreen into Main.
Got MainScreen working almost properly.

Still to do--either implement nextYearRequest and prevYearRequest, or remove and let MainScreen handle it internally.

Also:
fixed getYearString in Year
modified addData in YearList
Implemented DetailScreen.

Will now try to merge this into Main without breaking anything.
Started merging DataScreen into Main

Did a little reorganizing of Main.start()
Finished merging all screen classes.

This is now a working version, ready for rigorous testing.

TODO: Add a full report function
Add some small changes before merging

Was trying to come up with a better way to minimize the window