Adding glideins_queued to the client monitoring info displayed in the server

[gonzalomerino]

Now the server web page displays information for each client's glideins_running and glideins_launched.

It would be nice to add glideins_queued to that information.

[dsschult]

Need to restructure how clients read the local queue, to separate out queued and processing jobs.

[jvansanten]

The client knows how many of the jobs are idle if you provide an idle_cmd. Otherwise, it considers all jobs in the queue to be "running."

[gonzalomerino]

This was done by Heath in another ticket (#110)