Merge remote-tracking branch 'upstream/master'
Added username to SCP deployment for optional target server username

(if different from developer machine username).
https://github.com/grow/pygrow/issues/30

Also, typo in README.md.
Issue #30: Cleaner optional username in SCP deploy.
Merge pull request #31 from denmojo/master

Issue #30: Added username option to SCP deployment