fix return value for update() method to return dict instead of list.

Add return_paging_info support, release candidate for wrapper 3.0.6

 + officially remove support for old api3_preview controller

  + find(): allow requesting a specific page of results instead of returning them all at once
  + add support for "session_uuid" parameter for communicating with a web browser session.

v3.0.4 fixes an issue with create() and adds support for Python "new …

…style" classes

added support for local files and connecting over http via authentica…

…ted proxy

Merge branch 'master' of github.com:shotgunsoftware/python-api