Rename docs/*.md => docs/*.txt

The documentation uses features of Python-Markdown that are not supported on
GitHub and it's better to get a source view of the docs anyway. For example,
that way comments and bug reports can reference a specific line of a file.

Of course, it makes sense for Github to render the README, so that is left
with the `.md` file extension.

1 files changed, 0 insertions, 37 deletions

diff --git a/docs/extensions/smart_strong.md b/docs/extensions/smart_strong.md
deleted file mode 100644
index 8de574f..0000000
--- a/docs/extensions/smart_strong.md
+++ /dev/null
@@ -1,37 +0,0 @@
-title:      Smart Strong Extension
-prev_title: Tables Extension
-prev_url:   tables.html
-next_title: CodeHilite Extension
-next_url:   code_hilite.html
-
-Smart_Strong
-============
-
-Summary
--------
-
-The Markdown Smart_Strong Extension adds smarter handling of double underscores
-within words. This does for double underscores what 
-[smart_emphasis](../reference.html#smart_emphasis) does for single underscores.
-
-The Smart_Strong Extension is included in the standard Markdown library.
-
-Usage
------
-
-    >>> import markdown
-    >>> markdown.markdown('Text with double__underscore__words.', \
-                          extensions=['smart_strong'])
-    u'<p>Text with double__underscore__words.</p>'
-    >>> markdown.markdown('__Strong__ still works.', \
-                          extensions=['smart_strong'])
-    u'<p><strong>Strong</strong> still works.</p>'
-    >>> markdown.markdown('__this__works__too__.', \
-                          extensions=['smart_strong'])
-    u'<p><strong>this__works__too</strong>.</p>'
-
-This extension is also included with the [Extra](extra.html) Extension. You may
-call that extension to get this behavior with all the other features of 'Extra'.
-
-    >>> markdown.markdown(text, extensions=['extra'])
-