Add website to DESCRIPTION

Author: olivroy

DESCRIPTION

@@ -18,7 +18,7 @@ Description: Plot official statistics' time series conveniently: automatic
     the user to export / import long format, wide format and transposed
     wide format data to various file types.
 License: GPL-2
-URL: https://github.com/KOF-ch/tstools
+URL: https://kof-ch.github.io/tstools/, https://github.com/KOF-ch/tstools
 BugReports: https://github.com/KOF-ch/tstools/issues
 Depends:
     R (>= 3.0.0),