Redo the part of commits b0beb0197a, c3f98cccbd, 6b0f5136e0, and 3736bfd189, reverted by commit e30a32d56e.
b0beb0197a
c3f98cccbd
6b0f5136e0
3736bfd189
e30a32d56e
Rename gimpblendtool{.c,-editor.{c,h}} to gimpgradientool{.c,-editor.{c,h}}. Note that this commit only renames the files; the actual changes are done in the next commit, so that git doesn't consider them new files.