plugin email invitations: re-use existing invitation for a given email: if an invitation is done on an email which has already received an invitation, it is re-used and no new XMPP account or Libervia profile is created (the name is modified though). This is currently done in an inefficient way due to `LazyPersistentBinaryDict` limitations (all invitations are loaded and checked to find the email). A more efficient check should be easier to implement with storage changes in 0.9 .

You'll find install instructions in documentation (see doc/installation.rst).

If you need help, come the SàT official XMPP room: sat@chat.jabberfr.org or join us with a web browser via https://chat.jabberfr.org/converse.js/sat@chat.jabberfr.org