Only add -I${includedir} to Cflags: not -I${includedir}/nbtk in nbtk.pc.in
Only add -I${includedir} to Cflags: not -I${includedir}/nbtk in nbtk.pc.in

This is needed for #include <nbtk/nbtk.h> to work correctly

pwithnall/mx,clutter-project/mx,clutter-project/mx,jonnylamb/mx,jonnylamb/mx,pwithnall/mx,jonnylamb/mx,clutter-project/mx,pwithnall/mx,jonnylamb/mx,clutter-project/mx,pwithnall/mx