add a readme to the pygame based map editor

map_editor/README.md

@@ -0,0 +1,11 @@
+# pygame based map editor from Marco
+
+This is a simple map editor from Marco who used pygame to create suitable .yaml files.
+
+Extensive documentation can be found in [docs/MAP_EDITOR_USAGE.md](../docs/MAP_EDITOR_USAGE.md)
+
+## SVG Map Parser
+
+I prefer to use `robot_sf/nav/svg_map_parser.py`.
+
+Look at `examples/svg_map_example.py` for an example of how to use it.