fixes bug 1006960 - Upgrade playdoh-lib for Django 1.5.6
bug 977218 - enable symbolsunpack cron app
Merge pull request #2044 from peterbe/bug-1006960-upgrade-playdoh-lib-for-django-156

fixes bug 1006960 - Upgrade playdoh-lib for Django 1.5.6
Merge pull request #2045 from peterbe/bug-977218-enable-symbolsunpack-cron-app

bug 977218 - enable symbolsunpack cron app
bug 1007186 - change to ./media/symbols_uploads