Update to 0.15.8:

* Fixes:
        #574174 - Remove deprecated libgnomeui dependency (Andr辿 Klapper)
        #554162 - Install colorblind applet to pyexecdir (Marcin Banasiak)
        #562079 - needlessly links against gdk-pixbuf-xlib (Matthias Clasen)
        #580186 - Use gtkbuilder instead of glade (Pedro Fragoso)
        Various - git, doap, etc. (Jaap Haitsma)

* Translations:
        Leonardo Ferreira Fontenelle (pt_BR)

(wiz)