adds some tests to challenge the lumped parameter nuclide model.
Merge branch 'develop' into lumped_tests
fixed set formulation test
porosity, not tot_deg
Merge branch 'develop' into lumped_tests
fixed lack of porosity variable.
added testing clarity...
eradicated EPM. Wasn't helpful.
implements DM, EM, and PFM models in lumped parameter class.
added some tests to the lumped nuclide model that have to do with geometry and volume
fills out the updated vec hist test.
added some stuff to the copy test. Now it fails. I deem this a success.
used new update_vec_hist in the absorb test. The absorption works
reinstated some sections of the extract tests. they pass.
no degradation in this model.
adds rudimentary C_DM, C_EM, C_PFM, and C_LAST_FORMULATION_TYPE tests.
temporary push, bus time!
added more depth to the C_EM, C_DM, C_PFM tests.
fixes the copy method and some of the tests. copy test parts relying on volume
still fail.
fixed porosity fail in copy