Removal of unsupported Klout API v1 functionality, API v2 functionality clean-up and simplification of starting the module

- Simplifies instantiation of the module by removing the need to define the _format_ and _version_.
- Removes support for XML. Klout [has removed support for it](http://klout.com/s/developers/docs).
- Removes reference and support for Klout API v1, as it has been [deprecated and removed by Klout as of April 1, 2013](http://klout.com/s/developers/v1).
- Removes method for multi-user look ups, as the functionality has been [removed from the Klout API](http://klout.com/s/developers/docs).
- Appropriate README updates to match changes to executing test and removing references to v1.
- Adds @michaeldelorenzo as a contributor.

[Michael De Lorenzo](https://github.com/michaeldelorenzo)
michael@delorenzodesign.com