Built in CSS Transform Checking

Instead of relying on a manually installed dependency, adds a
"doesBrowserSupportCssTransforms" util and calls it in CollapsibleHead
componentDidMount. Adds a class to html element if supported so that
styles will work. Also returns a boolean for javascript logic.
Merge pull request #11 from deseretdigital-ui/doesBrowserSupportCssTransforms

Adds doesBrowserSupportCssTransforms Util