Fix visitor not being able to use livechat if session expired

The `rocketchat-iframe-login` package uses `Match`, but the `check` packages was not added in `package.js`.

Minor tweaks on snap as recommended installation

word changed for emphasis

* Update deployment section to include snaps

* Update README.md

* Fix Doc path for snaps

@here support for only notifying users that are active

IRC package improvements

change username input selector

Fix the slack and hipchat importers on users importing.

Fix select custom field validation

Remove mapReduces from statistics

Fix match on livechat department save

adds options for ldap connect and idle timeout, removes password logging

Switch snap from imagemagick to graphicsmagick