Add the first part of the ZeroCloud tutorial
zerocloud: rename an example tutorial file
zerocloud: add tutorial for posting zerovm image
Merge pull request #36 from larsbutler/zerocloud-docs-outline

ZeroCloud  tutorial, part 1
Merge pull request #37 from larsbutler/post-zerovm-image

Tutorial for POSTing a ZeroVM image to ZeroCloud
zerocloud: add tutorial for posting jobs to an app
zerocloud: tweaks to formatting, wording, & markup
Merge pull request #38 from larsbutler/post-job-to-app

Document "POST job description to a pre-uploaded app"
zerocloud: fix a typo
Merge pull request #39 from larsbutler/fix-typo

zerocloud: fix a typo