Added capability to compile and run an IOP model without locking the CPU core. To compile with

this ability, one must add 'no_cpu_shutdown=1' to the IOP model Parameter block. 


git-svn-id: https://redoubt.ligo-wa.caltech.edu/svn/advLigoRTS/trunk@4944 6dcd42c9-f523-4c6d-aada-af552506706e