docutils 0.22rc4

Hei everyone,

next pre-release,

This release often works in clarifying things, thanks to all the testers
and many thanks to Günter for the work.

Changes that should be run through pre-release

* Drop the "name" option of the "target-notes" directive. (Report an
  error instead of silently ignoring the value.)

* New alias "rst-class" for the "class" directive to improve the
  compatibility with Sphinx.

* "Downgrade" targets generated from hyperlink references with embedded
  URI or alias from explicit to implicit (i.e. similar to the targets for
  sections, see implicit hyperlink targets for details).

thanks for your patience and help
 e