Add description method for OPFAnswer.

Signed-off-by: Aron Cedercrantz <aron@cedercrantz.se>
Add description method for OPFComment.
Add description method for OPFPost.
Add description method for OPFQuestion.
Add description method for OPFTag.
Add description method for OPFUser.
Change the formatting a tad.

Signed-off-by: Aron Cedercrantz <aron@cedercrantz.se>
Merge branch 'feature/fix-model-description-crash-12'

* feature/fix-model-description-crash-12:
  Change the formatting a tad.
  Add description method for OPFUser.
  Add description method for OPFTag.
  Add description method for OPFQuestion.
  Add description method for OPFPost.
  Add description method for OPFComment.
  Add description method for OPFAnswer.