Support 'using' directive with nested namespace in fast-vapi
Support 'using' directive with nested namespace in fast-vapi

Fixes bug 672960.

severinh/vala,Distrotech/vala,frida/vala,frida/vala,rvu95/vala,flobrosch/vala-fixes,frida/vala,GNOME/vala,Distrotech/vala,flobrosch/vala-fixes,xdave/pvala,GNOME/vala,frida/vala,playya/vala,rvu95/vala,rvu95/vala,frida/vala,spidermonkdust/vala,spidermonkdust/vala,GNOME/vala,playya/vala,spidermonkdust/vala,playya/vala,Distrotech/vala,severinh/vala,flobrosch/vala-fixes,GNOME/vala,severinh/vala