This is to ensure that running the same command twice dosent lead to unexpected behaviour

Print log

See merge request mpsd-cs/mpsd-software-environments!30

Logfile records everything, but logging output to screen can be adjusted

See merge request mpsd-cs/mpsd-software-environments!31

if MPSD_MICROARCH is not defined, use archspec to determine

See merge request mpsd-cs/mpsd-software-environments!32

Output to the shell is adjusted using the loglevel argument.

- full date is in file name
- can just use the time in here (could also remove that)

improve machine readable logging

Closes #6

See merge request mpsd-cs/mpsd-software-environments!28