Merge branch 'master' of https://github.com/kreta/kreta

Layout restyled using flex

Changed issue creation flow, now base on projects

Removed unnecessary statement

Merge pull request #96 from kreta/feature/transitions-frontend

Added status transition management in frontend

Fixed typo

Decoupled the path of default.png

Updated Travis CI infrastructure

Updated FOSUserBundle to dev-master

Updated Composer dependencies