Fluctuating MRT
Still needs an actual test case. Also, we don't need to specify 15 random variances, symmetry decreases that number significantly.
Fixes #80 (closed). Depends on https://i10git.cs.fau.de/pycodegen/lbmpy_walberla/merge_requests/1 and pycodegen/lbmpy!3 (merged).
Edited by Michael Kuron