Characters
http://xahlee.org/emacs/emacs.html
Unicode characters can be inserted with
Ctrl+x 8 " a => ä Ctrl+x 8 " A => Ä Ctrl+x 8 " s => ß
See list of characters generated this way
Ctrl+x 8 Ctrl+h
To avoid repeating 'Ctrl+x 8' too often
Alt+x set-input-method latin-2-prefix
