Added most of the docstrings to build_master_finders_table.py, what remains unupdated needs to be refactored. For Ticket #136. Local tests failing due to a missing dependency. Should still pass on Travis.
Merge pull request #140 from STScI-Citizen-Science/master-finders-jpl2db-merge

Added most of the docstrings to build_master_finders_table.py and refactored the code removing the unnecessary functions. There is still more cleaning to be done.