Jobsub can now do coulourful output

If it's OK to include CC BY-SA 3.0 code to jobsub we could have following nice features:

* Jobsub now prints output in colour if you include https://github.com/tbisanz/eutelescope/blob/342d82b8f0619dc66ce0425b5d78a5c94a974954/jobsub/jobsub.py#L18
* Jobsub checks if EUTelescope output contains the word "ERROR" or "WARNING" and directs them to the correct logger
* To use colourful output, set -g (--graphic) when running jobsub