adds dump and indent methods and generate_probmodelxml function
adds dump and indent methods and generate_probmodelxml function

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