Turbo Mode

When we first receive a message, we put ourselves to sleep to wait for a
moment.  The reason for this is that, when things are 'calm' on the bus, we
receive messages "too fast".  A message that arrives to the badge awarder
triggers (usually) a check against datanommer to count messages.  But if we
try to count them before this message arrives at datanommer, we'll get
skewed results!  Race condition.  We go to sleep to allow ample time for
datanommer to consume this one before we go and start doing checks on it.
When fedbadges was first released, this was absolutely necessary.

Since that time, the fedmsg bus has become much more congested.  So, to
improve our average speed at handling messages, we only do that sleep
statement if we're not already backlogged.  If we know we have a huge
workload ahead of us, then go ahead and start handling messages as fast as
we can.