Added byline tests for dossier and repository.
Added document byline tests.
Added task byline tests.
Started byline rework.
Added byline base class. Updated dossier byline.
Reworked document byline.
Reworked task byline: use base byline template.
Reworked mail byline: use base byline template.
Reworked repositoryfolder byline: use base byline template.
Merge pull request #133 from 4teamwork/lk_133_byline_rework

Byline rework