glib-2.0: Add ScannerMsgFunc and Scanner.msg_handler
glib-2.0: Add ScannerMsgFunc and Scanner.msg_handler

kamanashisroy/aroop,severinh/vala,frida/vala,playya/vala,frida/vala,tjol/vala-tjol,GNOME/vala,playya/vala,themiwi/vala,phako/vala,flobrosch/vala-fixes,GNOME/vala,jessevdk/vala,Distrotech/vala,tjol/vala-tjol,themiwi/vala,kamanashisroy/aroop,playya/vala,spidermonkdust/vala,jessevdk/vala,frida/vala,spidermonkdust/vala,frida/vala,tjol/vala-tjol,lovebug356/vala,flobrosch/vala-fixes,xdave/pvala,flobrosch/vala-fixes,rvu95/vala,severinh/vala,Distrotech/vala,GNOME/vala,rvu95/vala,GNOME/vala,Jc2k/vala,jessevdk/vala,Distrotech/vala,frida/vala,severinh/vala,spidermonkdust/vala,lovebug356/vala,Jc2k/vala,rvu95/vala,phako/vala,kamanashisroy/aroop,themiwi/vala