Add a GeneralizedReplicationService interface
Add getContentType to OLogEntry, for use by later codecs that want to ignore e.g. quorum configuration entries
Move EntryEncodingUtil to c5db-util module
Move SequentialEntryCodec into c5-modules module, c5db.interfaces.log package.
Generalize OLogReader to accept other kinds of SequentialEntryCodec
Add toString, equals, and hashCode to ReplicatorEntry
Add documentation to ReplicatorEntry
Move OLogToReplicatorEntryCodec to its own file in c5db-olog
Remove extraneous println from OLogToReplicatorEntryCodec
Add a test of ReplicatorEntry decoding