Removed extraneous N_k from computeWeights
Removed extraneous N_k from computeWeights

kyleabeauchamp/pymbar,wesbarnett/pymbar,wesbarnett/pymbar,jchodera/pymbar,wesbarnett/pymbar,jchodera/pymbar,kyleabeauchamp/pymbar,mrshirts/pymbar,kyleabeauchamp/pymbar,Lnaden/pymbar,wesbarnett/pymbar,jchodera/pymbar,choderalab/pymbar,kyleabeauchamp/pymbar,Lnaden/pymbar,choderalab/pymbar,Lnaden/pymbar,mrshirts/pymbar,mrshirts/pymbar,mrshirts/pymbar,choderalab/pymbar,jchodera/pymbar