Imported the HLS module.
	new file:   hls/src/Makefile
	new file:   hls/src/hls.c
	new file:   hls/src/hls.h
	new file:   hls/src/test.c
Refactoring.
	modified:   hls/src/hls.c
	modified:   hls/src/hls.h
	modified:   hls/src/test.c