More explicit support for return codes
Merge branch 'master' of github.com:pyfarm/pyfarm-agent into entrypoint_return_code
only start/stop requires --master (fixes #62)
fix agent_api url for status (fixes #63)
copy/paste error, only needed for start
Merge pull request #66 from pyfarm/entrypoint_return_code

More explicit return codes and other pyfarm-agent fixes
Merge branch 'master' of github.com:pyfarm/pyfarm-agent into master_reannounce