Fixed user and usage API calls

Components user and usage have been patched as described by issue #8
🎉

Patch: Fixed PyPi packaging

Some work has been done to fix the PyPi packaging and to improve the examples. The updated README.md now reflects the current state of this project.

Full HTTP methods support

Methods GET, POST, PUT, DELETE, HEAD and OPTIONS are now supported. If a method is not specified via an argument, the request defaults to GET.

Initial public release

This version provides basic HTTP GET requests to the Cloudian Hyperstore Admin API server 🎉