Overview of changes in gnome-calculator 3.11.3
    * New : Custom functions (Garima Joshi)
    * New : Support for factorials of positive decimal numbers (Rashid Khan)
    * Update : Depend on newer versions of GTK, Vala (Michael Catanzaro)
    * Update : Translations
    * Update : Use HeaderBar (Michael Catanzaro)
    * Fix : Stop using stock icons (Robert Ancell)
    * Fix : Compilation warnings (Robert Ancell)
    * Fix : Title in basic mode (Michael Catanzaro)
    * Fix : Typos (Christian Kirbach, Seán de Búrca)
    * Fix : Newline text wrap bug (Kevin THIERRY)
    * Fix : "Malformed expression" stays forever bug (Rashid Khan)
    * Fix : AppData (Richard Hughes)
    * Fix : Misc cleanup (Michael Catanzaro, Olav Vitters)