PGPError
PGP packet parsing
removed TODO about dumping fields
testing PGPSignature against pgpdump now
created files for testing PGPKey and PGPKeyCollection
added requirement for enum34 (required for python <= 3.4)
minor modifications to get Python 2.7 working
removed scope="module" because it was unnecessary for most tests, and for nicer organization of test output
added fixture parameter ids where possible for nicer test result output