Switched Keen IO PHP SDK to use Guzzle Web Service Client

Added support for:
Bulk Loading
Parallel Requests
Data Analysis methods
Service Description and Version of Webservice Client

Updated Readme and Unit Tests
Updated client to allow operations to be called with the event collection as the first argument - to better conform with other Keen IO libraries.  Updated docs to reflect change.
Change Tom's contact info
Changed spaces to psr-2
Merge pull request #18 from TomHAnderson/pr-guzzle

Pr guzzle