Updated the url of the new site in the announcement
Updated the url of the new site in the announcement

andreabedini/numexpr,andreabedini/numexpr,pombredanne/numexpr,robbmcleod/numexpr,pombredanne/numexpr,pydata/numexpr,pombredanne/numexpr,robbmcleod/numexpr,andreabedini/numexpr,robbmcleod/numexpr,pydata/numexpr,pydata/numexpr