Added a running map to keep track of which simulations are running on which
cluster members. This allows the distributor to ensure that members are idle
before distributing jobs to them, thereby preventing samples from being dropped
by the cluster.

Removed a lot of printlines that were used for debugging purpuses.

Signed-off-by: Bennie Leonard <bennie.leonard@gmail.com>
Merge pull request #6 from benniel/running_map

Added a running map