Start the deprecation of Python 2.6 support

See #165

docs/about/release-notes.md

@@ -45,6 +45,7 @@ themes
 ### Other Changes and Additions
 
 * Fix issues when using absolute links to Markdown files. (#628)
+* Deprecate support of Python 2.6, pending removal in 0.16.0. (#165)
 * Add support for [site_description] and [site_author] to the [ReadTheDocs]
   theme. (#631)
 * Bugfix: Ensure consistent ordering of auto-populated pages. (#638)

mkdocs/__init__.py

@@ -1 +1,12 @@
+#!/usr/bin/env python
+# coding: utf-8
+
+from __future__ import unicode_literals
+
+import sys
+
+if sys.version_info < (2, 7):
+    sys.stderr.write(("WARNING: Support for Python 2.6 will be dropped in the "
+                      "0.16.0 release of MkDocs\n\n"))
+
 __version__ = '0.15.0.dev'