Add command to the CLI to import entities into the store

![qcli](https://cloud.githubusercontent.com/assets/146040/3633474/5612500a-0ee4-11e4-9c1c-427e237ae1e1.jpg)

Rough version. Still needs continuation support, deal with properties, report errors and allow setting the batch size. Will get to all these things (and probably more) in follow ups.