Metrics send and query abstraction layer with URI-based backend configuration, in Python Includes backend support for Datadog

This package uses an URI-style configuration for providing credentials and options. The schema looks like:

`metrics://<backend_api_key>@<backend_name>?<option1>=xxx&<option2>=xxx`

e.g. for datadog: metrics_uri = 'metrics://xxxx@datadog?app_key=xxxx&debug=true'

The development system is built by Rake.

To install the dependencies, run:

$ rake install

To run test, run:

$ rake lint && rake test