made it work on testproject
commented segmentedControll creation out
Cell now creates Segmented controlls from segments
fixed Subclass of FormField, added init for SegmentedFormField
added onTap closure to FormElement
added onValueChanged closure to SegmentedFormCell
renamed didChangeValue, converted didSelect from function to property
made transformers optional
moved cell related methods from the cell to FormElement, cleanup
added ForwardingCell
worked in comments
using  realInternalValue
Merge pull request #1 from BObereder/development

Development
changed layout in SegmentedFormCell, didchangeValue now gives you the cell that changed
some more changes
moved validation into FormUtilities
moved convertToRepresenationValues into FormUtilities
made changes
Merge pull request #2 from BObereder/development

Development
made changes