girparser: Allow specifying abstract metadata for classes
girparser: Allow specifying abstract metadata for classes

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