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/utils.py

@@ -8,6 +8,7 @@ import logging
 from codecs import open as _open
 from datetime import datetime
 from itertools import groupby
+from jinja2 import Markup
 from operator import attrgetter
 
 logger = logging.getLogger(__name__)
@@ -44,6 +45,7 @@ def slugify(value):
 
     Took from django sources.
     """
+    value = Markup(value).striptags()
     if type(value) == unicode:
         import unicodedata
         value = unicodedata.normalize('NFKD', value).encode('ascii', 'ignore')