- Implemented parser classes for Public-Key Encrypted Session Key v3 packets, Compressed Data packets, and Literal Data packets
 - Added stub classes for Symmetric-Key Encrypted Session Key v4 packets, One-Pass Signature v4 packets, Symmetric-Key Encrypted Data packets, Marker packets, Symmetric-Key Encrypted and Integrity Protected Data v1 packets, and Modification Detection Code packets
 - Updated PGPKeyring a bit; now returns a list of unique fingerprints loaded by PPGKeyring.load and PGPKeyring.fingerprints
 - Added a shortcut property to PrivKeyV4 that returns True if the secret key material is encrypted, otherwise False
 - Fixed a small parsing bug in Opaque(Packet) that parsed incorrect lengths on versioned packets. This was previously dead code, so it would not have appeared before adding the versioned packet stubs.