add trim() to feed_twitter from twitterwidget,

to make it more robust to faulty userinput.
set .single .post to max-width: 100%,

prevents from exceeding width when large images are added.
Merge pull request #14 from PeterTheOne/master

twitterwidget input trim and minor css fix
Merge remote-tracking branch 'upstream/master' into next
Link zu "Allen Artikeln" auf der Startseite hinzugefügt
Style des "Alle Atrikel"-Buttons angepasst
Merge branch 'next'
Version 1.1.4