nsplex: Print dm_plex_box_faces value

nsplex: Print FEM space degree

nsplex: Move python parsing function to stdoutParsing.py

- Contains function for parsing STDOUT of nsplex function
- Python function outputs dictionary, which can be easily turned into
pandas Data

nsplex: Move python parsing function to stdoutParsing.py

- Contains function for parsing STDOUT of nsplex function
- Python function outputs dictionary, which can be easily turned into
pandas DataFrame

nsplex: remove FLAG ARGS from stdoutParsing.py regex

- "FLAG ARGUMENTS" was a feature from a script I ran, not from the
nsplex executable itself.

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nsplex: Calculate computation time

nsplex advection2d: choose only the smooth initial condition

nsplex advection2d: make solution time-dependent

nsplex: Calculate exact solution at final time

nsplex: Implement ICs_PetscMultiplicity function

nsplex: Add non_zero_time flag to problemData

nsplex: Create SetupContext struct, add to ICs* qfuncs

- SetupContext added to common.h
- Update ICs qfuncs to reference pointer-based struct

nsplex: Move User_ and Units_ to common.h

NS: move initial condition into form usable for essential BC

This permits DMAddBoundary to apply boundary conditions. It is
expensive, but still useful for visualization.

NS: create visualization DM once for reuse in monitor

This interpolation is relatively expensive to create, so move it out.
Output of dmrefined*.vtu is currently controlled by -viz_refine, which
is

NS: create visualization DM once for reuse in monitor

This interpolation is relatively expensive to create, so move it out.
Output of dmrefined*.vtu is currently controlled by -viz_refine, which
is a boolean, but could become an integer (useful for higher order).

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NS advection.h: bug fix for dim=3

fixed some bugs in explicit densitycurrent.h

Gravitational Energy is sent back to the Body Force for some limitations that should be resolved.

dt removed from SUPG

few bugs fixed in densitycurrent_primitive.h

Examples - remove imode variables in PETSc examples

ElemRestriction - make lmode a separate enum

Examples - initalize variable to silence compiler warning

ElemRestriction - move lmode to constructor over apply

PETSc - add DoF/node output in PETSc examples

Fix petsc/bp4&bp6 with OCCA (#444)

* Some cleaning

* Make bp4.okl consistent with bp4.h

Restriction - add lmode to ElemRestrictionGetMultiplicity