Fix email templates
Fix phased follow caching
Fix extract_included_tags return
Fix template error
Speed up compress_with_languages.

Hopefully will speed up deploys
Fix fabfile setup_all
Template block fixes.
Template fix again
Fix double-region-follow button
Custom 500 handler view.

Unfortunately, we don't get any template context in the 500 view, so
this means the template barfs because the pre-rendered {% compress %}
blocks don't yet exist for the given LANGUAGE_CODE (None).  So we set up
a custom 500 view with some sane defaults to avoid this.
Fix up page follow area phased-tags stuff.
More fix up for follow area in templates.
Another minor error
Fix post-edit follow message
Fix for language subdomains & xsession
Fix map edit area.

(VirtualEarth JS was removed)
Inline rather than @import('olwidget.css')

Fixes error with django-compressor
Fix up varnish/memcached invalidation w/ links, tags
Fix varnish secret key setup.
Fix migrations