Added 'form_order' option useful to prioritize fields in filter form
Merged in chives/datasource (pull request #6)

Added 'form_order' option useful to prioritize fields in filter form
Added travis-ci configuration and fixed symfony/property-acccess dependency problem
Merge pull request #1 from norzechowicz/travis

Added travis-ci configuration and fixed symfony/property-acccess depende...
Added alias to dev-master branch
Merge pull request #2 from norzechowicz/composer

Added alias to dev-master branch