Django 1.7 support

* ./runtests.py will now run when Django 1.7 is installed. (I tested back to Django 1.4)
* Cleared up the Django 1.8 warnings.
* Tests will run in Django 1.7. Classes that threw known Django issues, now pass, and print a warning.


Same comment as above, the exception is too broad.  I suggest:
```python
meta = self.model._meta
info = meta.app_label, getattr(meta, 'model_name', meta.module_name)
```