Updates to the UniqueUnion routine.

UniqueUnion now finds the 'source' files in the root, reads as UTF-8,
converts from U-label to A-label, and then generates the merged file.
All data is deposited in the 'data' directory and labeled for the day of
creation.
Generated new A-label files for April 2014.

The UniqueUnion.jar file can run from the bin directory.  Double-clicked
it there and it found the source files, generated new data, and
deposited in the 'data/2014-04-17' directory.