Radio button refactor

[mbeard]

Refactor of the radio control.

[swilliamset]

@mbeard please rebase to resolve merge conflict

[swilliamset]

@sjames include undocumented methods no longer available in the release notes

[interactivellama]

The following undocumented public methods have been removed from radio:
setState, toggleContainer

Additionally, the radio and checkbox controls are now bound to the parent element with the respective .radio and .checkbox classes and no longer to the <input> element.

@mbeard Anything else that you would like to see in the release notes?

[chriscorwin]

Went to review this, there's significant diffs from the latest master.

@mbeard can you pull latest from upstream and merge master in then re-submit this?

[mbeard]

@chriscorwin done

[chriscorwin]

Cool... except now the radio highlighting isn't working, similar to how checkbox isn't in its branch.

I have tweaked the rules, and uploaded what radio.less should be to a gist, here:

https://gist.github.com/chriscorwin/63ef5e32609ef677c2ef

Put that into place and I think we're golden.