v0.11.0

Release v0.11.0

* Add `InstaLooter.get_metadata` method, returning the metadata dictionnary
  of the current profile (or ValueError if in hashtag mode)
* Fix issue with private profile not being recognized as private (and not
  showing any warning)
* Fix bug with new URLs used inconsistently by Instagram
* Update documentation of InstaLooter.__init__
* Update README links to benjaminp/six on GitHub instead of Bitbucket