Added web statistics

Every website hosted by us has received automated web statistics analysis and an accompanying webpage that displays this information, available via http://<domain>/webstats. See for example the statistics of this site.

With this transition, I moved from the old webalizer to AWstats. Old statistics (up until 11 September 2011) are still be available via http://webalizer.luon.net, optionally followed by the domain name.