No need to drop const -- hubbub's API is already sane.
No need to drop const -- hubbub's API is already sane.

svn path=/trunk/libdom/; revision=13569

prepare/netsurf_libdom,Achal-Aggarwal/libdom,prepare/netsurf_libdom,prepare/netsurf_libdom,Achal-Aggarwal/libdom,Achal-Aggarwal/libdom,dunkelstern/libdom,dunkelstern/libdom,Achal-Aggarwal/libdom,prepare/netsurf_libdom,dunkelstern/libdom,prepare/netsurf_libdom,dunkelstern/libdom,Achal-Aggarwal/libdom,prepare/netsurf_libdom,dunkelstern/libdom,dunkelstern/libdom,Achal-Aggarwal/libdom