use couchdbkit==0.6.5.5

This seems to have been causing some issues. If I do the following,

```
pip uninstall jsonobject jsonobject-couchdbkit
pip install jsonobject==0.4.2 jsonobject-couchdbkit==0.6.5.2
./manage.py shell
```
I get an error. If I do

```
pip uninstall jsonobject jsonobject-couchdbkit
pip install jsonobject==0.4.2 jsonobject-couchdbkit==0.6.5.5
./manage.py shell
```

everything works great.