Support for Storyboard reuse identifier and nib file.
observe UIKeyboardWillShow & UIKeyboardWillHide.
Button selection can be handled using a selector or block. Added some examples.
prevent deselection of selector row if row is required.
Added addAsteriskToRequiredRowsTitle property to XLFormDescriptor.
Removed image row key from available keys. It should be added as a custom cell, check it out at /Examples/Others/CustomCells.
v2.1.0
Fixed "(null)" caption when `XLFormRowDescriptorTypeSelectorLeftRight` row required error message is shown.
Merge pull request #158 from pastorin/master

Fixed "(null)" caption when `XLFormRowDescriptorTypeSelectorLeftRight` r...
minor change.
Add row descriptor to validations error to easily show an error mask for invalid rows