Fixes for mm_notification_api & mm_build_notification

Managing parameters for the GET request as manual query-string appendages (use as $args is interpreted as directives to the management of the request, rather than as arguments for the remote URL). Also fixes $notice variable name re-use which was overwriting the message contents before they could be included in the string for return.

Work still needs to be done on the MOJO side to look at the GET parameters (no JSON validation) and to return properly formatted contents.