Merge pull request #2 from keithj/devel

LSF enhancements
allow for running on an arbitrary lsf cluster: the default queue is taken from LSB_DEFAULTQUEUE before falling back to normal; a list of available queues is created dynamically by querying lsf
Merge pull request #3 from mgcam/devel

allow for running on an arbitrary lsf cluster: the default queue is take...
Merge pull request #4 from keithj/devel

Remove requirement for LSB_STORAGE_LOCATION environment variable
Made lsf_default_queue return a symbol or nil

Made lsf_default_queue and find_lsf_queues private

Made tests more robust to local variations in queue naming