Adding default API's methods on Interfaces
Adding class ApiQuery

* Adding class
* Adding method addParameter
Adding implementation to hasPamameter method
Adding implementation to getParameter method
Adding fluent API on method addParameter
Adding implementation of removeParameter and addParameters methods
Adding implementation of getQueryString method
Adding missing docblocks
Merge branch 'feature-make-query-string-with-apiquery-class' into develop

Adding class ApiQuery, implementing ApiQueryInterface

Changelog:

* Implementation of all Query API methods
* Implementation tests of the ApiQuery class
Merge pull request #1 from hussani/develop

Changes on default public API and implementation of concrete ApiQuery class