Merge pull request #84 from cbare/master

add accepts header to request for API key
show testing endpoints earlier
SYNR-546 Change "warning message" in versions file to tell users about upcoming forced client upgrade
consolidate is_synapse_entity, is_locationable and is_versionable methods
change entityType to concreteType, 3 tests fail, to be fixed up later:
integration_test.py:test_fileHandle, integration_test_Entity.py:test_update_and_increment_version, test_command_line_client.py:test_command_line_client
added --skip-checks option to command line client
Merge pull request #86 from cbare/develop

changed entityType to concreteType and added --skip-checks option to command line client
updated version to 0.5.0 and blacklisted old versions
Merge pull request #87 from cbare/develop

updated version to 0.5.0 and blacklisted old versions