Add Cython wrappings for expanded config interface.
Add Cython wrappings for expanded config interface.

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