updated load-graph.py output listing to list all files written to. Also updated print statement to write to sys.stderr and to conform to python2 format.
updated load-graph.py output listing to list all files written to. Also updated print statement to write to sys.stderr and to conform to python2 format.

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