Container creation now works. However, it currently doesn't handle the
various X- headers in the docs.
Allow for an individual status code for "expected" as well.
Create container with optional metadata.
Attempted to refactor but ultimately realized that DRYing would
negatively impact clarity--and that the extracted methods wouldn't
be resuable for other metadata-enabled entities.
Doc updates plus removed superfluous args from delete
Merge pull request #6 from elight/create_container

Create container