[field] extend spatial_gradient, laplace, divergence in _field_math to arbitrary finite difference schemes by adding the Scheme argument
[field] introduce dyadic interpolation for resampling grids with an offset of exactly half a cell
[math] add tensor implementation for dyadic interpolation in _nd
[math] add ANTISYMMETRIC and ANTIREFLECT extrapolations for later use in higher order boundaries
[physics] extend advect, diffuse by universal finite_difference implementations [physics] Add Scheme to make_incompressible()
[field] extend spatial_gradient, laplace, divergence in _field_math to arbitrary finite difference schemes by adding the Scheme argument [field] introduce dyadic interpolation for resampling grids with an offset of exactly half a cell [math] add tensor implementation for dyadic interpolation in _nd [math] add ANTISYMMETRIC and ANTIREFLECT extrapolations for later use in higher order boundaries [physics] extend advect, diffuse by universal finite_difference implementations [physics] Add Scheme to make_incompressible()