Reorganize and add A-label structure

- Moving UniqueUnion.jar into the bin directory.
- Created a data/A-label directory and added A-label conversions for
each section's file.
- Created a data/U-label directory but left this empty for now.  Files
at the root could be moved here, or some other action could be taken.
- Added a final directory to store files with a unique union of Reserved
Names.  Added the unique union of A-labels to this directory.