Releasing Blogofile

Checklist for doing a release of Blogofile and the blogifile_blog plugin.

Do a platform test via tox:
```
$ tox -r
```
Ensure that all features of the release are documented (audit CHANGES.txt).
Ensure that the docs build:
```
$ cd docs
$ make clean html
```
Write a release post for blogofile.com.
Change version number in:
- Blogofile:
  - blogofile/__init__.py
  - docs/conf.py
  - CHANGES.txt
- blogofile_blog:
  - blogofile_blog/__init__.py
- blogofile.com:
  - _config.py

Test upload to PyPI:

$ python setup.py sdist register -r testpypi upload -r testpypi

for both Blogofile and blogofile_blog.

Test installation in a pristine virtualenv:

$ virtualenv --python=python3.2 blogofile-testrel
$ cd blogofile-testrel
$ source bin/activate
$ pip install --extra-index-url http://testpypi.python.org/pypi \
      "Blogofile==<version>"
$ pip install --extra-index-url http://testpypi.python.org/pypi \
      "blogofile_blog==<version>"

and then test building a site, even if it's the sample blog via:

$ blogofile init test_blog blog
$ blogofile build -s test_blog

Create release tags in Blogofile and blogofile_blog repos.
Release to PyPI:
```
$ python setup.py sdist register upload
```
for both Blogofile and blogofile_blog.
Publish the release post for blogofile.com:
```
$ git push publish
```
Announce to blogofile-discuss group/maillist.
Annouce to Google+.
Announce to Twitter.