PyParsing fails to install if 2.0.0 is installed

Python3 nonlocal statement in the setup.py in PyParsing
Merge pull request #214 from mcfletch/patch-1

PyParsing fails to install if 2.0.0 is installed
Another hard-coded reference to "Zinnia's Blog"
Record IP address for trackbacks to allow for de-spamming
Make an easily discovered rss link for categories
Prevent archive <year> from consuming shortlink (but no archive year as a result)
Merge github.com:mcfletch/django-blog-zinnia