create up-and-running slide deck
 rearrange UnR slides

this order is now better aligned with the workflow of:

1. creating a repo
2. publishing to GitHub
3. cloning (as a contributor)
4. submitting a PR
5. merging the PR
slim down 'log' slides for UnR
Merge pull request #144 from github/up-and-running

Add "Up and Running" deck