Call Cloud Search API with multiple querystring values

Faraday re-parses the URI provided to it, so make sure it is using the
flat parameters setting.

[fixes #450]

Author: blowmage

lib/gcloud/search/api_client.rb

@@ -28,7 +28,8 @@ class APIClient #:nodoc:
       ##
       # Creates a new APIClient instance.
       def initialize _options
-        @connection = Faraday.default_connection
+        @connection = Faraday.new request: {
+          params_encoder: Faraday::FlatParamsEncoder }
       end
 
       def discovered_api name, version