Add python3 support to cupSODA simulator (#255)
Add python3 support to cupSODA simulator (#255)

The current unit test suite for the cupSODA interface fails on Python 3.
This commit has a few small changes to add Python 3 compatibility and
fix the unit test suite.
alubbock/pysb,jmuhlich/pysb,LoLab-VU/pysb,pysb/pysb,johnbachman/pysb,LoLab-VU/pysb,johnbachman/pysb