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, 80 deletions

diff --git a/docs/extensions/smarty.txt b/docs/extensions/smarty.txt
deleted file mode 100644
index 247658a..0000000
--- a/docs/extensions/smarty.txt
+++ /dev/null
@@ -1,80 +0,0 @@
-title: SmartyPants Extension
-prev_title: Sane Lists Extension
-prev_url:   sane_lists.html
-next_title: Table of Contents Extension
-next_url:   toc.html
-
-SmartyPants
-===========
-
-Summary
--------
-
-The SmartyPants extension converts ASCII dashes, quotes and ellipses to
-their HTML entity equivalents.
-
-ASCII symbol | Replacements    | HTML Entities       | Substitution Keys
------------- | --------------- | ------------------- | ----------------------------------------
-`'`          | ‘ ’ | `‘` `’` | `'left-single-quote'`, `'right-single-quote'`
-`"`          | “ ” | `“` `”` | `'left-double-quote'`, `'right-double-quote'`
-`<< >>`      | &laquo; &raquo; | `&laquo;` `&raquo;` | `'left-angle-quote'`, `'right-angle-quote'`
-`...`        | &hellip;        | `&hellip;`          | `'ellipsis'`
-`--`         | &ndash;         | `&ndash;`           | `'ndash'`
-`---`        | &mdash;         | `&mdash;`           | `'mdash'`
-
-Using the configuration option 'substitutions' you can overwrite the
-default substitutions. Just pass a dict mapping (a subset of) the 
-keys to the substitution strings.
-    
-For example, one might use the following configuration to get correct quotes for 
-the German language:
-
-    extension_configs = {
-        'markdown.extensions.smarty': {
-            'substitutions': {
-                'left-single-quote': '&sbquo;', # sb is not a typo!
-                'right-single-quote': '&lsquo;',
-                'left-double-quote': '&bdquo;',
-                'right-double-quote': '&ldquo;'
-            }
-        }
-    }
-
-!!! note
-    This extension re-implements the Python [SmartyPants] 
-    library by integrating it into the markdown parser.
-    While this does not provide any additional features,
-    it does offer a few advantages. Notably, it will not 
-    try to work on highlighted code blocks (using the 
-    [CodeHilite] Extension) like the third party library 
-    has been known to do.
-    
-[SmartyPants]: http://pythonhosted.org/smartypants/
-[CodeHilite]: code_hilite.html
-
-Usage
------
-
-See [Extensions](index.html) for general extension usage, specify 
-`markdown.extensions.smarty` as the name of the extension.
-
-See the [Library Reference](../reference.html#extensions) for information about
-configuring extensions.
-
-The following options are provided to configure the output:
-
-Option                | Default value | Description
-------                | ------------- | -----------
-`smart_dashes`        | `True`        | whether to convert dashes
-`smart_quotes`        | `True`        | whether to convert straight quotes
-`smart_angled_quotes` | `False`       | whether to convert angled quotes
-`smart_ellipses`      | `True`        | whether to convert ellipses
-`substitutions`       | `{}`          | overwrite default substitutions
-
-Further reading
----------------
-
-SmartyPants extension is based on the original SmartyPants implementation
-by John Gruber. Please read it's [documentation][1] for details.
-
-[1]: http://daringfireball.net/projects/smartypants/