Merge tag 'v0.3.1' into develop

Released v0.3.1
Merge tag 'small_unimportant_changes' into develop

v0.3.2
New layout for landing page (index.html)
New layout for instructor's dashboard
New layout for student's dashboard
Merge branch 'feature/fresh_interface' into develop
Merge pull request #15 from pbanaszkiewicz/develop

Bootstrap interface