Update components.css

Remove hgroup from html5 display definitions, cause hgroup is deprecated and deleted from the w3c specs. even if it is still listed in the WHATWG. http://www.w3.org/wiki/HTML/Elements/hgroup
Update _normalize.scss | remove deprecated hgroup

Remove hgroup from html5 display definitions, cause hgroup is deprecated and deleted from the w3c specs. even if it is still listed in the WHATWG. http://www.w3.org/wiki/HTML/Elements/hgroup
Merge pull request #83 from webdesignberlin/patch-1

Update components.css | remove deprecated hgroup