New version V1.5.0 of rst.el

Hi!

Today I uploaded a new version of `rst.el` - the reStructuredText
major mode for Emacs. This is a very big patch which is basically a
major refactoring introducing some abstractions reflecting
reStructuredText concepts.

Indeed I developed this for some years now and I'm using the current
version for quite some time. Given this and the array of unit tests I
added I consider this version production ready.

I also pushed this version to the Emacs development tree but at the
moment have no idea in which Emacs version it will finally appear. May
be it is 25.2.

Please find the log entry for this version below.


						Grüße

						Stefan

=== 8< === 8< === 8< === 8< === 8< === 8< === 8< === 8< === 8< === 8< ===

Major refactoring:

* Introduce classes `rst-Ado', `rst-Hdr', `rst-Ttl' and `rst-Stn'
  representing reStructuredText section header concepts.

* Introduce use case approach for systematic testing of section header
  adjustment (files `tests/adjust-uc.el` and
  `tests/adjust-uc_doc.rst`).

* Revise and refactor some old code.

* Add lots of unit tests.

* Replace `set (make-local-variable 'VAR)` by `setq-local VAR`.

* Fix minor bugs.

Minor feature changes and fixes:

* Link final newline in a toc buffer so navigating at the end of the
  line works.

* Improve section header adjustment slightly.

* Integrate and update tutorial.

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