User index, show, update.
Opportunity methods and unit tests.
indaba object holds your token.

Rather than passing your token in on every request, construct an object
that contains the token.  Makes API easier to remember.
separate login from client side code.
Merge pull request #6 from indabamusic/api_changes

Api changes
Options instead of offset.

Allows for limit, order_by, etc.
List submissions and submission
fetchFullOpportunity: fetch host
Optional options.