Form Validation: Basic radio/checkbox demo

Needs additional work for group label as the current one shows up
inline.
Added working examples for form validation of checkbox and radio button groups.
Added working examples for form validation of checkbox and radio button groups.
Merge pull request #1641 from nschonni/add-radiobutton-validation-demo

Form Validation: Basic radio/checkbox demo
Resolved merge conflict
Resolved merge conflicts.
Merge pull request #1666 from pjackson28/master

Added working examples for form validation of checkbox and radio button groups