create question with markdown, create comment preview, present question markdown support

i18n support, remove comments
3 jobs for 386-allow-markdown-for-formatting-a-question-also-in-the-student-role in 11 minutes and 52 seconds (queued for 1 second)
Status Job ID Name Coverage
  Codestyle
passed #217832
nodejs
tslint

00:01:50

 
  Test
passed #217833
nodejs
unit_tests

00:02:23

 
  Build
passed #217834
angular
ngbuild

00:07:38