now actually fully testing secret key parsing and the PGPDumpFormat class
PrivKey was missing 'name' attribute
TestPGPPrivateKey.test_parse was missing pgpdump
pgpdump fixture knows about TestPGPPrivateKey now
PGPDumping non-encrypted secret keys now! :D
off by one parsing the S2K salt field; storing coded count for ease and speed
PGPDumpFormat now handles String2Key fields and all secret key fields; now verifying that secret keys are being properly parsed. Closes #8