cc_observer takes a callback instead of a channel

Signed-off-by: Karl Isenberg <kisenberg@pivotallabs.com>
cc_servistry conforms to Service interface

Signed-off-by: Karl Isenberg <kisenberg@pivotallabs.com>
roughed in interruptability, refactored to use new callback observer interface

Signed-off-by: Karl Isenberg <kisenberg@pivotallabs.com>
naiming cleanup

Signed-off-by: Karl Isenberg <kisenberg@pivotallabs.com>
print started on stdout not stderr

Signed-off-by: Karl Isenberg <kisenberg@pivotallabs.com>
bump godeps

Signed-off-by: Karl Isenberg <kisenberg@pivotallabs.com>