all arrays have ghost nodes - this is much more safe for coding and wastes only very little memory
optimize loop ordering where bad loops found
restore: AB2/EE1 for fluid (AB2 requires CFL=0.1..thats sad)
remove obsolete files
bugfix: forgot to sync in basic_operators
restore: drag and unst corrections
minor tuning in insects, perf stats, write meanflow and mask volume to disk