update form html layout
fix documentation, we work with a string, now with an array for choices
Remove unneeded index.html.twig
When implementing FormAdaptorInterface's adaptForm interface we should also pass the required option to the formBuilder

If this is not set all fields will show as required in their labels.
Update translations
Merge pull request #57 from Kunstmaan/fix_required_label

Fix required label
Merge pull request #58 from Kunstmaan/fix_translations

Update translations
validation of form pageparts & error messages refactored (fallback = default Symfony error messages)
tests fixed
Merge pull request #59 from Kunstmaan/fix_form_pageparts_validation

validation of form pageparts & error messages refactored
Update .travis.yml