Updated to Play 2.1.1

This is a minor release (bugfix version) see https://groups.google.com/forum/?fromgroups=#!searchin/play-framework/2.1.1/play-framework/8-TWGmb-V44/CzDgckfBGLoJ

I ran this for Articles over the weekend to ensure there were no perf issues.

Also added some stats (via ganglia) so we can see the size of connection pools.