Update README

jekyll part still missing
Upload new french index and Kontakt
Merge branch 'gh-pages' of https://github.com/Yannickw/yannickwirner.com into gh-pages
Aktualisierung Index fr
Übungscommiten zum lernen :)
Aktualisierung Index de
Remove old form add new one
remove contact form confirmation page (after sending)

no longer required, as replaced by podio
Merge branch 'topics/add-podio-contact-form' of github.com:Yannickw/yannickwirner.com into topics/add-podio-contact-form