Make `source_classification_pe` compatible with the new `computeDiskMass` function
The current function source_classification_pe
in em_bright.py
has an outdated function-call to computeDiskMass
. This needs to be fixed so that it can have access to the full spectrum of functionality of computeDiskMass
. Most importantly, it should be able to run with a specified EoS, or with a fixed neutron star radius model.