New features
[4af9be7] Updated the application to use Symfony Flex (@javiereguiluz)
[2273e82] Added scalar typehints/return types (@yceruto)
[29d97f8] Use the new PHPUnit namespace (@yceruto)
[fe8f4ab] Use the new Twig namespace (@yceruto)
[047b1e3][36a8ba0] Improved tests on Travis (validate Composer files, cache PHPUnit installs) (@stof)
[8c4d972][71ebca4][067c6ec] Updates for the latest Symfony Flex changes (replace "null" by "~" in YAML files, update Makefile) (@yceruto)
Bug fixes
[b610dc9] Fix some minor configuration issues (@yceruto)
[5358558] Default to non-debug in index.php and console (@yceruto)
[1fc329c] Workaround to use DATABASE_URL with %kernel.project_dir% parameter (@yceruto)
[2fbc7f7] Fixed jQuery instantSearch plugin and search result (@yceruto)
[a8e9adc] Updated env variables for the heroku deployment (@stof)
[e62210d] Used validator on interactive mode (@yceruto)
[6d3cb7d] Moved browser-kit and css-selector to require-dev (@garak)
[f9ffa26] Fixed add user password validation (@chr-hertel)
[adbc23b] Updated Russian and Ukrainian translations (@bocharsky-bw)