Switch docs to MKDocs (#602)

Fixes #601. Merged in 6f87b32 from the md3 branch and did a lot of cleanup.

Changes include:

* Removed old docs build tool, templates, etc.

* Added MkDocs config file, etc.

* filename.txt => filename.md

* pythonhost.org/Markdown => Python-Markdown.github.io

* Markdown lint and other cleanup.

* Automate pages deployment in makefile with `mkdocs gh-deploy`

    Assumes a git remote is set up named "pages". Do

        git remote add pages https://github.com/Python-Markdown/Python-Markdown.github.io.git

    ... before running `make deploy` the first time.

1 files changed, 0 insertions, 73 deletions

diff --git a/docs/release-2.0.txt b/docs/release-2.0.txt
deleted file mode 100644
index f44b0c5..0000000
--- a/docs/release-2.0.txt
+++ /dev/null
@@ -1,73 +0,0 @@
-title:      Release Notes for v2.0
-prev_title: Release Notes for v2.0.1
-prev_url:   release-2.0.1.html
-next_title: Authors
-next_url:   authors.html
-
-Python-Markdown 2.0 Release Notes
-=================================
-
-We are happy to release Python-Markdown 2.0, which has been over a year in the 
-making. We have rewritten significant portions of the code, dramatically 
-extending the extension API, increased performance, and added numerous 
-extensions to the distribution (including an extension that mimics PHP Markdown
-Extra), all while maintaining backward compatibility with the end user API in
-version 1.7.
-
-Python-Markdown supports Python versions 2.3, 2.4, 2.5, and 2.6. We have even 
-released a version converted to Python 3.0!
-
-Backwards-incompatible Changes
-------------------------------
-
-While Python-Markdown has experienced numerous internal changes, those changes 
-should only affect extension authors. If you have not written your own 
-extensions, then you should not need to make any changes to your code. 
-However, you may want to ensure that any third party extensions you are using
-are compatible with the new API.
-
-The new extension API is fully [documented](extensions/api.html) in the docs. 
-Below is a summary of the significant changes:
-
-* The old home-grown NanoDOM has been replaced with ElementTree. Therefore all
-  extensions must use ElementTree rather than the old NanoDOM.
-* The various processors and patterns are now stored with OrderedDicts rather 
-  than lists. Any code adding processors and/or patterns into Python-Markdown 
-  will need to be adjusted to use the new API using OrderedDicts.
-* The various types of processors available have been either combined, added, 
-  or removed. Ensure that your processors match the currently supported types.
-
-What's New in Python-Markdown 2.0
----------------------------------
-
-Thanks to the work of Artem Yunusov as part of GSoC 2008, Python-Markdown uses
-ElementTree internally to build the (X)HTML document from markdown source text.
-This has resolved various issues with the older home-grown NanoDOM and made
-notable increases in performance.
-
-Artem also refactored the Inline Patterns to better support nested patterns 
-which has resolved many inconsistencies in Python-Markdown's parsing of the 
-markdown syntax.
-
-The core parser had been completely rewritten, increasing performance and, for 
-the first time, making it possible to override/add/change the way block level
-content is parsed.
-
-Python-Markdown now parses markdown source text more closely to the other 
-popular implementations (Perl, PHP, etc.) than it ever has before. With the
-exception of a few minor insignificant differences, any difference should be
-considered a bug, rather than a limitation of the parser.
-
-The option to return HTML4 output as apposed to XHTML has been added. In 
-addition, extensions should be able to easily add additional output formats.
-
-As part of implementing markdown in the Dr. Project project (a Trac fork), among
-other things, David Wolever refactored the "extension" keyword so that it
-accepts either the extension names as strings or instances of extensions. This
-makes it possible to include multiple extensions in a single module.
-
-Numerous extensions are included in the distribution by default. See
-[available_extensions](extensions/index.html) for a complete list.
-
-See the [Change Log](change_log.html) for a full list of changes.
-