xcb: Add more methods and use Vala types for accessing data
xcb: Add more methods and use Vala types for accessing data

https://bugzilla.gnome.org/show_bug.cgi?id=730218

flobrosch/vala-fixes,frida/vala,rvu95/vala,GNOME/vala,GNOME/vala,GNOME/vala,rvu95/vala,flobrosch/vala-fixes,frida/vala,frida/vala,spidermonkdust/vala,rvu95/vala,spidermonkdust/vala,frida/vala,spidermonkdust/vala,GNOME/vala,flobrosch/vala-fixes,frida/vala