added tests for File entity commands.  supporting code to follow
switched from composition to inheritance; added first round of File tests
SYNR-358
SYNR-358 all tests pass
Merge branch 'SYNR-358' into develop
SYNR-358: more testing
SYNR-358: more testing
cleaned up TODOs and commented out code
Merge pull request #57 from brucehoff/develop

SYNR-358