Apply typogrify on the title.

As it is done when reading the file, we need to remove html tags for the
permalink and the slug (this is done here for the notmyidea and simple themes).

While modifying the themes I also replaced the `pagename` template tag with
`article.url` (`pagename` was an empty variable, no more used ?).

pelican/readers.py

@@ -174,5 +174,6 @@ def read_file(filename, fmt=None, settings=None):
     if settings and settings['TYPOGRIFY']:
         from typogrify import Typogrify
         content = Typogrify.typogrify(content)
+        metadata['title'] = Typogrify.typogrify(metadata['title'])
 
     return content, metadata