Added validations for radio button groups when the given radio button
has a name
Modified radio group checking to only perform group checking when a
radio group actually exists
Minor whitepsace change
Merge branch 'develop' of https://github.com/casperin/nod into develop

Conflicts:
	nod/checker.coffee

Further edited radio button group validations to be inline with new code
Compacted code length to be within acceptable limits
Merge pull request #26 from chall8908/develop

Added validations for radio buttons groups