We officially support only Unix-like systems which are traditionally
case sensitive. The value of 'lower_case_file_system' we return is
therefore 'OFF'.

Added BooleanValueConverter.BooleanToStringConverter strategy which
controls how the BooleanValueConverter expresses values to the user:
YES/NO, ON/OFF, 1/0
Change MyBackendDecoder to encode outbound packets, generating sequence from tracked exchange rather than value in message.
Remove MyResultSetResponse from the message hierarchy since it is unused and has special-cased encoding.
Funnel all full message writes through Packet.writeFullMessage(seq,payload,destination)
Expose a common sequence number and remove writeTo() from MysqlMessage hierarchy.
Remove abstract MyEventMessage which implemented replication specific interface and only had one subclass, MyReplEvent.