Added //hold// and //resume//

With //hold// and //resume// used in the comments as equivalent to
//review//, it is now possible for an official reviewer to put a review
//temporarily on hold.

Signed-off-by: Lars Kiesow <lkiesow@uos.de>
Moved worker to separate file

Signed-off-by: Lars Kiesow <lkiesow@uos.de>
Moved portal to separate file

Signed-off-by: Lars Kiesow <lkiesow@uos.de>
General code clean-up

Signed-off-by: Lars Kiesow <lkiesow@uos.de>
Moved all configuration to a separate file

Signed-off-by: Lars Kiesow <lkiesow@uos.de>