Fixed typo: CopntentType
Merge pull request #73 from utapyngo/master

Fixed typo: CopntentType
Added to admin docs how to add polymorphic child model as inline.
Merge pull request #74 from vail130/master

Added to admin docs how to add polymorphic child model as inline.
Fixed tab spacing in admin.rst
Merge pull request #75 from vail130/master

Fixed tab spacing in admin.rst
Fix get_real_instance_class for proxy models
Merge pull request #77 from gnulnx/jf/polymorphic

Fix proposal for get_real_instance_class() for proxy models
Added changelog entry for PR #77