Allowing the client login to be overridden

I have been using Droogle to interact with Google Spreadsheets and other parts of the Zend library.

The droogle_get_client_login_http_client function in appsapis.inc file is hardcoded to the Zend_Gdata_Docs.

The below patch allows this to be overridden if necessary in any custom code and perhaps also allows the module to be used a more general library for interacting with Google APIs.