Merge branch 'hotfix/gitflow_support_for_travis'
Add Vagrant
Update Travis
Update contributing
Update readme [ci skip]
Merge pull request #20 from AlouaneMed/master

[Backend] Add a vagrant box to the project
Revert "remove public assets folder"

This reverts commit 05523e2785c2884ea1985399b1f75eadecd54f16.
Merge branch 'hotfix/restore_landing_page' into develop