Create a group in CommonSense.
            If GroupsPost is successful, the group details, including its group_id, can be obtained by a call to getResponse(), and should be a json string.
            
            @param parameters (dictonary) - Dictionary containing the details of the group to be created. 
                                    
            @return (bool) - Boolean indicating whether GroupsPost was successful.

def GroupsPost(self, parameters):
        """
            Create a group in CommonSense.
            If GroupsPost is successful, the group details, including its group_id, can be obtained by a call to getResponse(), and should be a json string.
            
            @param parameters (dictonary) - Dictionary containing the details of the group to be created. 
                                    
            @return (bool) - Boolean indicating whether GroupsPost was successful.
        """
        if self.__SenseApiCall__('/groups.json', 'POST', parameters = parameters):
            return True
        else:
            self.__error__ = "api call unsuccessful"
            return False