Log Message:
py-django-extensions: updated to 2.2.3

2.2.3
Changes:
- Fix: admin widgets, fix import of static template tag (part 2)

2.2.2
Changes:
- Fix: autoslugfield, find unique method overrideable
- Fix: notes, do not replace dot in template dirs
- Fix: admin widgets, fix import of static template tag
- Improvement: print_user_for_session, use session backend
- Improvement: sqlcreate, postgis support
- Improvement: graph_models, permit combination of includes and excludes
- Improvement: Adds missing GIS engine to DEFAULT_MYSQL_ENGINES
- Improvement: sqldiff, use lowercase field names in MySQL
- Improvement: sqldiff, mysql code could duplicate AUTO_INCREMENT and UNSIGNED \ 
statements