Include redis in the getting started commands

This is really just an attempt to work our a flow by which people with private forks of l2met, when collabed on the ryandotsmith/l2met repo, can submit upstream changes. The steps I took:

1. Create a private l2met repo on github. e.g. private/l2met
2. Clone ryandotsmith/l2met repo
3. Set private/l2met as "origin" in .git/config
4. Set ryandotsmith/l2met as "upstream" in .git/config
5. $ git fetch
6. $ git rebase upstream/master
7. $ git checkout -b new-feature
8. $ git push upstream new-feature

This assumes that you have collab access to ryandotsmith/l2met. I don't have a workaround without granting collab access :(