beginnings of an intro blog post
fix a few typos
Merge remote-tracking branch 'origin/master' into sandbox
symlink pandoc to /usr/local/bin
Merge branch 'sandbox' of github.com:rocker-org/rocker into sandbox
Update RockerIntro.md

Fix github link, add link to Rocker-Org, add hyphen.
Merge pull request #47 from rocker-org/sandbox

Sandbox