[FEATURE] Include Normalize.css

Include normalize.css to render html consistently.
This way a more solid base for css adaptions is set.

"Normalize.css makes browsers render all elements more
consistently and in line with modern standards. It precisely
targets only the styles that need normalizing."
-http://necolas.github.io/normalize.css/

Change-Id: Ia31784a1b2e00c631d4983de8ed8fc82e15b84be
Resolves: #47920
Releases: 6.2
Reviewed-on: https://review.typo3.org/20497
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer