try redirect python logs per rank to file excluding rank 0

[PhilipDeegan]

it can get pretty hectic in the command line with error messages from many ranks

so I suggest we do redirect most ranks (>0) to file, and if there's an earlier exit due to errors (on rank 0 or otherwise) we display a message like

Errors have been encountered, see files in $PWD/.log

logging the exit code might be an idea too

this is also good for docker, as if you detach from a docker container, and reattach later when the simulation is finished, you don't see any logs as the screen is cleared.

maybe there's some hdf5 (or similar) solution to minimize inodes...