Change interface, make stateless

- bump to version 0.1
- remove resource storage features
- refactor wrappers as single responseMiddleware
- add support for URL templates
- make service call parameters linked from service calls to resource managers to clients
- add example usage to README
basic unit test coverage with mocha

- Rename Charon.ServiceCallError to just Charon.ServiceError
- Deprecate Charon.ServiceCallError (delete in next version)
- increment minor version