Added fluid temp model evaluator for solving fluid flow model with nox.
Also added unit test to ModelEvaluatorUnitTests, and modified CMakeLists
to compile this. Also added skeleton of power and temp model evaluators,
which will eventually implement the three way coupling by doing nonlinear
elimination, iterating on the power and composite fluid/fuel temp respectively.
Got the model evaluator for the flow model working properly and modified its unit test.
Got the model evaluators for the three way coupling working (iterating on either power
or fuel temperature), and added scripts using these to solve the model problem, both
with Picard and Anderson. Added status tests for fuel/fluid temp convergence, and changed
existing status tests and PrePostOperator to work with the new model evaluators. Also had to
change two-way model evaluator to accomidate this.