Implement DARIAH styleguide
- BS 4
(from redmine: issue id 1215, created on 2018-11-05tgradl, closed on 2019-01-08)
- Relations:
- child #1216
- child #1217
- child #1218
- child #1219
(from redmine: issue id 1215, created on 2018-11-05tgradl, closed on 2019-01-08)