Update the scheduler to reconnect to the controller

Signed-off-by: Lewis Marshall <lewis@lmars.net>
Set updated_at when removing a formation

This is so that it will appear as an update when Subscribing to
formation events since a particular time

Signed-off-by: Lewis Marshall <lewis@lmars.net>
Drop comment from scheduler

Since we track the last update seen from the controller and request all
updates after that when reconnecting, there is no need to sync with the
cluster when reconnecting.

Signed-off-by: Lewis Marshall <lewis@lmars.net>
Merge pull request #33 from flynn/scheduler-reconnects

Scheduler reconnects