New Circularly_Polarized_Alfven_Wave initial condition type. Note that this test has a very limited set of initial conditions where it is meaningful and so most of them are hard coded and the rest are checked with assert statements
Lowered the maximum divergence to 1E-9 after discussing with Chris White of the Flatiron institute who's an Athena dev.
Added new system tests for the circularly polarized alfven wave
New parameter file for the circularly polarized alfven wave
Minor refactor of MHD utils to make more consistent use of the computeMagneticEnergy function.
polarizationparameter for this testCircularly_Polarized_Alfven_Waveinitial condition type. Note that this test has a very limited set of initial conditions where it is meaningful and so most of them are hard coded and the rest are checked with assert statementscomputeMagneticEnergyfunction.