jp (base, pubsub/set): new `--quiet` argument: `--quiet` can be used to only return essential data from command. This is notably useful to remove message and trailing line feed when returning a data which must be parsed by an other program.

# XXX: the Monkey Patch is here and not in src/__init__ to avoir issues with pyjamas compilation
# TODO: remove this when changes are merged in Wokkel
from sat_tmp.wokkel import install
install()