Update to 1.0.

Smarter pkgdiff, doesn't create chunks that are added automatically
by the pkgsrc infrastructure (configure:exit instead of regenerate,
Makefile: localedir).

mkpatches: patch file names now contain the path to the file and its name
per discussion on tech-pkg June 2010.
Also, the files are created directly in the patches/ directory; backups
are saved as patches/patch-foo.orig.

patchdiff: now compares patches/patch-foo with patches/patch-foo.orig;
if they only differ in non-essential parts, patchdiff reinstates the
original patch to keep commits less noisy.

(wiz)