Use @dev versions of dependencies during development.
Added more symfony versions for the Travis tests
Sorting $_POST array output in `advanced_form_post.php`.
Merge pull request #27 from aik099/use-dev-mink-version-in-development-fix

Use @dev versions of dependencies during development
Merge pull request #30 from aik099/sort-arrays-in-output-fix

Sorting $_POST array output in `advanced_form_post.php`