-updated version number to match pypi distributions.
-fixed installation bug (issue #15).
-fixed a bug with the phi angle being corrected for orbital motion -fixed a bug when, due to orbital motion, phi increases above 90 degrees or below -90 degrees
-made sure numpy>=1.16.2 is installed when installing catwoman
-actually removed unused files (see below)
-removed unused files from directory so they aren't include in installation
-fixed a bug with installing catwoman straight from source archive, involved removing unused python files from import
- fixed setup.py file so catwoman specifies and downloads dependencies automatically when pip installed in a new environment