Add support for Function and Trigger domain objects (#1060)

Vast commit, includes:

 * Introduces the Trigger domain entity.
 * Introduces the Fns domain entity.
 * V2 of the API for interacting with the new entities in swaggerv2.yml
 * Adds v2 end points for Apps to support PUT updates.
 * Rewrites the datastore level tests into a new pattern.
 * V2 routes use entity ID over name as the path parameter.

api/server/call_list.go

@@ -16,13 +16,13 @@ func (s *Server) handleCallList(c *gin.Context) {
 	var err error
 
 	appID := c.MustGet(api.AppID).(string)
-	// TODO api.CRoute needs to be escaped probably, since it has '/' a lot
+	// TODO api.ParamRouteName needs to be escaped probably, since it has '/' a lot
 	filter := models.CallFilter{AppID: appID, Path: c.Query("path")}
 	filter.Cursor, filter.PerPage = pageParams(c, false) // ids are url safe
 
 	filter.FromTime, filter.ToTime, err = timeParams(c)
 	if err != nil {
-		handleErrorResponse(c, err)
+		handleV1ErrorResponse(c, err)
 		return
 	}