Include v0.5.2 release notes in release index page
Fix a few logging annoyances

- South no longer spits out its debug logs when building the sandbox
- Use named loggers in Oscar (not using __name__)
Update AUTHORS file

Using:

    git log --format="%aN" | sort | uniq -c \
        | sort -rn | awk '$1 >=15 {$1=""; print $0}' \
        | cut -d" " -f2- > AUTHORS
Use uWSGI and supervisor in sandbox
Update search index every hour in sandbox site