Draft out update for current facebook ads api (2.2)

2.0.0
=====

- update Koala to 1.10.1
- use the `/search?type=adinterestq=interest` endpoint to validate ad
  interests
  instead of `/search?type=adinterestvalid&interest_list=['interest']`
- use json objects instead of string values for ad interests
- don't escape commas with %2C when passing searches on to koala
- update ad account properties
- fix consecutive `#save`s without a `#reload` in between

Breaking changes:
----------------

If you upgrade from 1.x, make sure you read the following:

- `Zuck::AdInterest.search` results use the `audience_size` key in order
  to use
  the same names as the facebook api. In zuck 1.x it was `audience`
- `Zuck::TargetingSpec.initialize` does not take string interests
  anymore,
  but expects `{id: '123', name: 'foo'} objects, see
  "[Specifying values for interests as a string will be sunset in favor
of a JSON object of id and
name](https://developers.facebook.com/docs/apps/migrations/ads-api-changes-2014-04-09)"
- `Zuck::AdInterest.best_guess` returns an ad interest object, what was
  formerly the `:interest` key is now called `:name`
- Ad Campaigns are now called Ad Sets, and Ad Sets can be grouped
  together in Ad Campaigns [see
docs](https://developers.facebook.com/docs/reference/ads-api/adcampaign/v2.2)
Update README
Merge pull request #15 from moviepilot/update-to-last-breaking-changes

Update to last fb api breaking changes