Those are mini tasks still to do. They should be filed against a bug
trucker as soon as TPL will have one:

- add a logstore-ro interface or split the current one in rw and ro
  depending on what/who is using it
- global configuration object (ie disable logging partially or totally,
  choose the logstore, etc)
- understand if direction from tpl_log_entry_text is to be removed 
- understand if TplContact is still useful or can be substitued by a
  simple TpContact
- use the Message interface of received messages to handle delivery
  notifications & Co.