There are some changes in the backend
which have to be changed here to fit.

[Ticket: #142]

This commit fixes the UserRole error.
After a user enters a room,
another check is performed to ensure his role.

[Ticket: #118]

There are now many events for the room,
that can be received via websocket.

Also improved performance.

[Ticket: #109]

Ticket: #109

[Ticket: #78]

Filtering is still done with tags, not keywords
Waiting for group 3 to implement [Ticket: #38]
[Ticket: #7]

Group 4 wanted a different rotation mechanism. Also, some code was cleaned up.

Refactored Filter Options

Fixed period filters not being set if not done in filterTimePeriod

WIP

This reverts commit a8c705b8.