this reverts 9df80fbde19e561699af33b591e4fdb6c7bbf9cf
fixing the crash by requiring EMail.php (from AWL)
Note: this isn't called when inviting people yet, only when replying to
an external organizer or when cancelling a meeting with external
attendees. Actually sending these emails instead of just logging them
also requires setting $c->iMIP->send_email = 1;
* Changed the end-of-line encodings of all non-Windows-related and non-autogenerated text files to use UNIX LF (lots of them had mixed LF/CRLF).
Conflicts:
inc/caldav-PUT-functions.php