Merge pull request #575 from beardy-unixer/master

If we find a home.html, also look for a home.css
bypass smarty wherever using intltext_templates (install, register, friend confirmation emails, etc.)
missing session template_engine calls
update smarty diabook templates bug 525
DE: update to the strings
ZH-CN: update to the strings
rev update
Merge https://github.com/friendica/friendica into pull
Prevent oembed videos overlapping nav bars in Quattro based themes