Merge pull request #277 from fdeberle/announcements

Announcements: Add author automatically (#270)
Bug: Groups don't show any members whose email address is not all-lowercase.
Fix: We need to list the members by emails with case-insensitive search of emails => does not work with $in query...
Side-Effect: Fixed faulty mocking in test.
Merge pull request #278 from fdeberle/announcements

When announcement.author not given (or empty), display 'automatisch'
Merge pull request #279 from NicoleRauch/master

Bugfix: Groups don't show any members whose email address is not all-lowercase
Merge pull request #280 from fdeberle/announcements

Announcements: Verwaltung-Nachrichten zwei Tabellen geht nicht (#269)
copying activity does not copy registered members anymore
Merge pull request #282 from leider/master

copying activity does not copy registered members anymore
escaping for regular expressions in searches
Merge pull request #285 from leider/master

escaping for regular expressions in searches (bugfix & improvement)
New Page: FAQ
Merge pull request #286 from leider/master

New Page: FAQ
Merge branch 'master' of https://github.com/softwerkskammer/NeuePlattform-Implementierung into announcements

Conflicts:
	test/commons/misc_test.js