create a macro for gpu resource
parse GPUS as a resource
debug pring gpu resources if specified
add gpus to work_queue_resource struct
align parameters to clearly demonstrate parallel structure of function calls
use gpus in work queue worker when making decisions about resources and
reporting usage
mention gpus as option in work queue worker documentation
add gpus as option to work_queue_worker
fix typo
fail if user tries to automatically detect gpus since it is not yet supported.
add default gpu count to man page
Merge branch 'gpu_resource' of git://github.com/rampantmonkey/cctools into rampantmonkey-gpu_resource

Adds GPU as a work queue resource.