gitk: Allow users to view diffs in external diff viewer
tree13a22a5ff81b7358b27d9128a0d0c57b9bb34296
-rw-r--r-- 1771 Makefile
-rwxr-xr-x 245613 gitk
drwxr-xr-x - gitk-git
drwxr-xr-x - po