Update guestbook to fix given recent changes.
Added KUBERNETES_PROVIDER instructions Getting started locally
Merge pull request #2399 from brendandburns/guestbook

Update guestbook to fix given recent changes.
Merge pull request #2403 from shaicoleman/kubernetes-local-doc-fix

Added KUBERNETES_PROVIDER instructions Getting started locally
Fix up formatting and sed usage for heapster deploy.

Also, 'sed -i' isn't supported well across BSD and GNU versions of sed.  See http://stackoverflow.com/questions/5694228/sed-in-place-flag-that-works-both-on-mac-bsd-and-linux.  And we were editing files that were checked in to git with a password.  Instead, do this with class sed redirection in a temp dir.

Fixes #2400.