Add some features for scalability:
	-q option to specify quantization bits
	-f option to specify antialias filter
	-b option to specify bandwidth

Some definitions are also ordered.

	modified:   Makefile
	new file:   bitPower.cu
	modified:   cpg_power.c
	modified:   cpg_spec.c
	modified:   cuda_fft_xspec.cu
	modified:   cuda_polaris.inc
	modified:   k5sample_store.c
	modified:   k5sim.c
	modified:   polaris_start.c
	new file:   pow2round.c
	modified:   shm_k5data.inc
	modified:   shm_spec_view.c