Added add_cpds method to add the Table tag to XML file.
Added add_cpds method to add the Table tag to XML file.

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