added install target to Makefile
added install target to Makefile

jas14/khmer,Winterflower/khmer,Winterflower/khmer,F1000Research/khmer,ged-lab/khmer,kdmurray91/khmer,jas14/khmer,souravsingh/khmer,Winterflower/khmer,F1000Research/khmer,souravsingh/khmer,kdmurray91/khmer,ged-lab/khmer,jas14/khmer,F1000Research/khmer,ged-lab/khmer,kdmurray91/khmer,souravsingh/khmer