add mysql note
upgrade South to 1.0

This will make life easier when we start thinking about Django 1.7
Allow COMPRESS_ROOT to be overridden in local_settings.py

When running the selenium tests like this:

    ./manage.py harvest --settings=mediathread.settings_test
    mediathread/main/features

COMPRESS_ROOT needs to be set correctly.
Merge pull request #39 from thraxil/south-1.0

upgrade South to 1.0
Merge pull request #42 from nikolas/selenium-settings-fix

Allow COMPRESS_ROOT to be overridden in local_settings.py
Merge pull request #38 from ccnmtl/mysql-config

add mysql note