document the API

Author: AlexanderWillner

Makefile

@@ -34,7 +34,7 @@ test: ## Test the code
 
 .PHONY: doc
 doc: ## Document the code
-	@$(PYDOC) $(SRC_CORE).things
+	@$(PYDOC) $(SRC_CORE).api
 
 .PHONY: clean
 clean: ## Cleanup