Big change from CPU-based segment formation to GPU-based one.

	modified:   Makefile
	modified:   cpg_setup.c
	modified:   cpg_spec.c
	modified:   cuda_fft_xspec.cu
	new file:   cuda_polaris.inc
	modified:   erase_shm.c
	modified:   k5sample_store.c
	new file:   k5sim.c
	modified:   polaris_start.c
	modified:   shm_alloc.c
	modified:   shm_k5data.inc
	modified:   shm_segdata.c
	modified:   shm_spec_view.c