add makefile for building man pages

Author: lonvia

docs/Makefile

@@ -0,0 +1,8 @@
+ARGPARSE_BASEARGS=--author 'Sarah Hoffmann' --author-email '[email protected]' --project-name pyosmium --url https://github.com/osmcode/pyosmium/
+
+man:
+	mkdir -p man
+	argparse-manpage --pyfile ../tools/pyosmium-get-changes --function get_arg_parser ${ARGPARSE_BASEARGS} --output man/pyosmium-get-changes.1
+	argparse-manpage --pyfile ../tools/pyosmium-up-to-date --function get_arg_parser ${ARGPARSE_BASEARGS} --output man/pyosmium-up-to-date.1
+
+.PHONY: man