Master

Main change is to switch to new fsl_sub CUDA selection method. Have left it as an option for the user to override this. Nothing added to select correct CUDA SDK, but don't see how that could be hardcoded.

Also quoted rm command input where it is a variable for safety.

Have not quoted the rm {}* and rm {}bin* as I don't understand the syntax.

No longer mail the user on completion.

fsl_sub is now used to delete jobs, check on existence of cluster queues (no longer hard coded to expect SGE) and the presence of CUDA (environment variable no longer required that specifies the queue, and can find CUDA on a machine that isn't using a cluster submission suite).