Make the Edsf.Persona class follow our coding style
Make the Edsf.Persona class follow our coding style

Besides adhering to our coding style, this also
works around a bug in Vala that allows accessing

public string foo { get; set; }

through _foo.

Works around: https://bugzilla.gnome.org/show_bug.cgi?id=655741

GNOME/folks,pwithnall/folks,GNOME/folks,renatofilho/folks,renatofilho/folks,renatofilho/folks,pwithnall/folks,GNOME/folks,renatofilho/folks2,renatofilho/folks2,renatofilho/folks2,renatofilho/folks,pwithnall/folks,renatofilho/folks2