bellwood

This release addresses operational and correctness issues. In
particular:

• we've added significantly more logging to cernan (#136)
• we now fast-forward mpsc receiver (#137)
• metric bins are now scalable, qos is removed (#134)
• file source can watch directories of files (#132)
• federation receiver does not panic on hangup (#133)
• metrics now have an associated algebra (#131)
• metrics carry their own metadata (#129)

Signed-off-by: Brian L. Troutwine blt@postmates.com