handlers: add object support in triggerHandler responses
handlers: add object support in triggerHandler responses

triggerHandler will now use the 'text' field of the object
stored in responseMessage to send a plain text response

triggerHandler will now convert the object to string before
replacing the variables, so that all the variables can be
replaced from any field in the object

snkrsnkampa/Bastion,snkrsnkampa/Bastion