[tor-dev] Summary of meek's costs moved to tor-project list

I decided to move the meek cost emails to the tor-project list, because they are more project-y than dev-y. Here is the email for January 2016: https://lists.torproject.org/pipermail/tor-project/2016-February/000101.html There's a table of all previous summaries here: https://trac.torproject.org/projects/tor/wiki/doc/meek#Costs