Add const and restrict annotations to kernels and device functions.
Default grid idx on body_force to 0.
Fix disabling of invalid value checking on GPU.
Fix orientation setting for NTEquilibriumVelocity.
Fix the Zou-He velocity BC by properly computing the density using the
available distributions, prior to exexcuting the non-equilibrium
bounce-back step.
Add the regularized LB model and two boundary conditions based on it.
Update the TODO list.
Add a TODO to optimize the regularization model.
Add a function to update nodes in a running simulation.
Explicitly cast orientation to uint32.
Fix missing 2 factor in the density of the Taylor-Green test case.