Fix dev dependencies

Merge pull request #9 from bravesheep/marlonbaeten-patch-1

Moce bravesheep/phpspec-expect te dev requirements

Symfony flex

v7.0.0

Remove dependency on symfony/symfony, use framework-bundle instead

Symfony 3.4

Merge pull request #8 from tweedegolf/update-symony-3-4

Update symony to 3.4

Form action html classes added

v5.0.1

Improved new form action html

Dropped support for Symfony < 2.6

v5.0.0

Redirect handling, breaking changes for sf < 2.6

Fix referer redirect on edit form

v4.0.2

Don'tt store referer when ignore referer flag set

Fixed date format

Fixed bug in date formatting

Do not show the current date/time when a date/time value in NULL