Represent meeting notes/minutes as markdown files

We currently use a mix of markdown files in the repo and issues (#1, #2, #4) to take notes during meetings of the Hack for LA core group.

I have a couple of ideas:

1. Convert the open issues to markdown files, and close them
2. Going forward, use markdown files for meeting minutes/notes
3. Use issues for scheduling/agenda prep/tasks/etc. Close the issue when the schedule is set/meeting is over/task is complete/etc.

This will ensure the *results* of the meetings are always in a consistent, findable place (the repository contents itself) and remain independent of any source hosting service (e.g. GitHub) we choose to use.