Unreleased

• The numerical_scheme limiter value 'barth jespersen' now selects the multidimensional Barth & Jespersen limiter. It previously selected the one-dimensional function now called 'symmetric ratio', which takes no minimum or maximum over the cell's neighbours and so was never the Barth-Jespersen limiter. Decks that relied on the old behaviour must change to 'symmetric ratio'.
• Added the 'michalak gooch' and 'venkatakrishnan' limiter options, and a limiter_coefficient key.
• Removed the 'immersed wall' boundary condition, its immersed_wall_normal_type key, the immersed_boundary_surface output key and the immersed boundary yplus, immersed boundary friction velocity, immersed boundary vector and immersed boundary normal output variables. Decks that use them are rejected at input validation. update_input asks the engineer to choose a wall type for an 'immersed wall' boundary in a v1 deck.