Add note to job_conf.xml.sample_advanced about LWR+MQ.
Improvement to message queue driven LWR.

At high-level there are two core enhancements here - ability to kill message queue driven LWR jobs (though due to regressions in latest galaxy release there is not longer a way to initiate this from the GUI I don't think) and additional state transition (LWR+MQ jobs will now transition from queue to running properly, previously they just went from queue to complete).

A lot of other small changes to LWR client aimed at getting file size of lwr_client/client.py and lwr_client/manager.py under control - see LWR commit log for more details.

This updates the LWR client through LWR changeset 2d9f333.