Fix for issue when attaching AuditLog to custom auth model
Revert "Bump version info for hotfix-abstract-base-user release."

This reverts commit ff6f533793217ed2f952dc4e27b588db49e191d1.
Revert "Fix for audit_log ForeignKey on custom AUTH_USER_MODEL."

This reverts commit 329d81346e453e427381d1bb6dc5684cde68fc5c.
Merge remote-tracking branch 'upstream/master'