Add /repeat/ operation

[filippsen]

API:
space -m utils /repeat/ -e sleep=60 -m some_module /operation_to_repeat/ -e parameters...

Example:

This would be desirable for enabling Raspberry Pi control for setting up camera operations in a set interval.
For example, running a Space app when not logged in, automatically.

# pre-action: on target Pi, inside a tmux, run:
space -m utils /repeat/ -e sleep=60
      -m gitlab.com/rpi-shell/raspi /still/ -e file=
# post-action: put tmux in background and logout

Jun 5, 2017