TagCloser - don't close br and image tags
Test changes to TagCloser
Added John Groszko to AUTHORS
Merge
Added sanimedicaltourism.com to sites in README.
Clean up some docstrings
When using search against an abstract model (eg Displayable), filter the combined models searched against by the models represented in the SEARCH_MODEL_CHOICES setting. Closes #684.
Add a note to search docs about SEARCH_MODEL_CHOICES affecting abstract search behaviour.