Navigation Positionierungs-Fix
Show navigation ('#taucher').click function deaktiviert
smooth scrolling, navi z-index fix
Merge commit 'bcdfafe39bb5b59ba826ed5e3cac8a9e67491d8c' into Johnny

Conflicts:
	index.html
Merge commit '4331f202a0d09302375ad509332ae1954388dd58' into Johnny