Allow dialog param of get_response() to be a spoken string
Allow dialog param of get_response() to be a spoken string

This makes the dialog parameter dual-purpose.  It can be used as a
literal spoken string, or a dialog resource.  In the future the
announcement parameter can be retired.

linuxipho/mycroft-core,forslund/mycroft-core,MycroftAI/mycroft-core,forslund/mycroft-core,Dark5ide/mycroft-core,MycroftAI/mycroft-core,linuxipho/mycroft-core,Dark5ide/mycroft-core