Prototype-Leif: delete unused png-icons
Prototype-Leif: render message icons immediately
Prototype-Leif: add info icon
Prototype-Leif: QR-Codes
Prototype-Leif: Hide header and footer if keyboard is expanded
Prototype-Leif: added cancel button to mail view
Merge branch 'master' of https://github.com/mttronc/uni_hannover_mci_13ws
Prototyp-Leif: info icon in logo