+ added missing src/tcp files
+ added Copy for IoErrorcode
+ added Copy for IoError
+ added Endpoint::sendsyncbytype
+ added Endpoint::sendclonebytype
+ added lots more documentation for Endpoint
+ added more documentation for Message
+ added Message::dup_ifok
+ added Message::typeunwrap
+ relaxed compile time contraints on SyncMessage::get_payload
+ relaxed compile time contraints on CloneMessage::get_payload
! resolved some warning for tests/basic
- removed debugging output for tests/basic