Add info about webpage to README.md

README.md

@@ -4,6 +4,11 @@ GEOSTAT
 Tools for computing various statistics related to Geocaching/Opencaching
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+### Sample web interface
+
+A sample web interface to play with the tool is available at http://tomaszg.pl/geo/.
+
+
 ### Usage
 
 The main tool is called `geostat`. It is able to access `opencaching.pl` via `OKAPI` or from local database dump maintained by `geodb`. It can also partially read `GPX` files, e.g. exported from `C:GEO`. It produces various statistics (either as text output, or in a HTML form) and renders a heat map of found/not found caches in a selected region. HTML output requires a style sheet. Sample one is included as `geo.css`.