Query

Changed the class so that it supports the options as both array and query string format - Closes issue #2.

In this way one can pass directly a query string and not be completely dependent on the Zent\Http\Client way of creating a query string from an array of options - it is the same way as php http_build_query function and does not create the query string for multi-level arrays as is expected by an API such as Echonest.

Besides that I made the output be dependent on the format passed as a parameter.