Prepare material for the 2nd LSST Chile Workshop on community/communication tools:

Hands-on session about “LSST Community Tools” (which should be c.l.o., Slack, anything else that we want the community to be using). This is what I’d expect Jonathan would cover (participating remotely). Jonathan, can you compile some bullet points on what would be useful to speak about here? Imagine talking to an audience who has heard about the LSST, but is still relatively new to it and wants to get involved. What should they know?