Removing trailing whitespace
Merge pull request #17 from jeremyf/removing-trailing-whitespace

Removing trailing whitespace
Added :host ("ezid.cdlib.org") and :use_ssl (`true`) options to Client config.
Private API between Client and Request tweaked to maintain separation (i.e, so
that Request does not need access to Client): Request initializes with a full
URI rather than just a path.
Closes #15