[enh] display form to edit course description
[fix] don't pulldown the navbar when clicking on normal links
[fix] css error
[ref] code beautify
[enh] display message when no course/no thread
[merge] with titou/master
[fix] Remove old `populate` management command
[fix] __repr__ format error
Merge branch 'master' of https://github.com/C4ptainCrunch/beta402
Merge branch 'master' of https://github.com/ekatsah/beta402
[enh] Query optimisation
[enh] Query optimisation
[fix] don't amend an already published commit...
[fix] buggy merge and [enh] navbar : real <a> for links
Merge branch 'master' into design