I merged all the gnulib ChangeLog files into one ChangeLog, at the top. The merge was mostly done automatically, and no doubt could be done better (i.e., related changes put together), but that can be done later if someone has the time.
The changes are long and mechanical, so I'm not including them here. Here's a URL if you want to see them: http://cvs.savannah.gnu.org/viewcvs/gnulib/ChangeLog?root=gnulib&r1=1.718&r2=1.719
