What needs to be done to make askbot work with Django 1.4?

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This applies to askbot version 0.7.43. I've looked at the list of backwards incompatible changes in the Django release notes and so far found this:

• Stop using messaging system from contrib.auth. I suggest to implement an internal system similar to the old style messaging as a temporary solution to speed up the migration.
• Eliminate use of request.raw_post_data in the python code.
• Change to using new style Feed in askbot/feeds.py.

We need to make sure that migrated code still works with Django 1.2.

Please feel free to make pull requests on github, thank you for your help.