adds __mul__ method to Factor class
adds __mul__ method to Factor class

yashu-seth/pgmpy,sandeepkrjha/pgmpy,palashahuja/pgmpy,ankurankan/pgmpy,pgmpy/pgmpy,pratyakshs/pgmpy,liquidmetal/pgmpy,jhonatanoliveira/pgmpy,vivek425ster/pgmpy,anaviltripathi/pgmpy,pgmpy/pgmpy,kris-singh/pgmpy,jhonatanoliveira/pgmpy,palashahuja/pgmpy,vivek425ster/pgmpy,abinashpanda/pgmpy,sandeepkrjha/pgmpy,kislayabhi/pgmpy,khalibartan/pgmpy,abinashpanda/pgmpy,pratyakshs/pgmpy,liquidmetal/pgmpy,anaviltripathi/pgmpy,khalibartan/pgmpy,kris-singh/pgmpy,yashu-seth/pgmpy,ankurankan/pgmpy,kislayabhi/pgmpy