Updating team page re: Trello & Trac usage

Team communication page no longer reflected our current use of Trello over Trac white boards and for managing higher level and non-dev tasks.

To review go to https://www.openmicroscopy.org/site/support/contributing-staging/team-communication.html
I suspect it may be something to do with the software the original material was written in - this content pre-dates Sphinx I think. I certainly can't reproduce the curly quotes on my keyboard in TextMate. But since they render the same anyway...