code: public static Response get(String url, Parameter... params) throws HttpException {
  		return get(url, Arrays.asList(params));
  	}
docs: Do a GET request on the provided URL and construct the Query String part
  with the provided list of parameters. If the URL already contains
  parameters (already contains a '?' character), then the parameters are
  added to the existing parameters. The parameters are converted into
  <code>application/x-www-form-urlencoded</code>. For example:
  <code>field1=value1&amp;field1=value2&amp;field2=value3</code>. The special
  characters are encoded. If there is a space, it is encoded into '%20'.
  
  @param url
  the base url
  @param params
  none, one or several parameters to append to the query string
  @return the response
  @throws HttpException
  when the request has failed