Encode to utf8 before quoting urls

Fixes #315.  Note that python3 works without this commit,
but python2 fails.
Merge branch 's3-unicode-copy' into develop

* s3-unicode-copy:
  Encode to utf8 before quoting urls
Updates for EC2 CLI examples--includes new and modified examples.
Merge remote-tracking branch 'upstream/develop' into develop