Drop author, email columns from posts table
Create CONTRIBUTING.md
Adding API /sets/:id

* Implement Sets API controller
* Add sets test & fixtures
* Added migration to add FK for user_id
  and unique set name index
Merge pull request #51 from ushahidi/api-sets

Merging Sets API .. party!
Merge branch 'posts-updates'

Conflicts:
	application/tests/features/bootstrap/FeatureContext.php
Updating for v0.8 of oauth2-server-php

* Updated Koauth_OAuth2_Server constructor
* Add OAuth2_Response param to fn calls as required
* Update processing on OAuth2_Response
* Skip processing OAuth2_Response when sending user to HTML form for
authorization
Only return JSON errors for API
Merge remote-tracking branch 'ushahidi/oauth' into develop

Conflicts:
	application/classes/Controller/Api/Posts.php
	application/tests/features/api.forms.feature
	application/tests/features/api.posts.feature
	application/tests/features/forms/api.groups.feature
Merge branch 'posts-improvements-for-migration' into develop

Conflicts:
	.gitmodules
	application/tests/features/api.posts.feature
Fixes after oauth merge

* Fix "response status code" step changing to "guzzle status code"
* Add oauth2Skip
* Add required last_location values
* Add required form id to oauth posts requests
* Increase attribute ID in Updates fixture - avoid clash with existing
  attributes
Fix SQL error in Posts api when values array empty or not set

Need to pass at least 1 ID to NOT IN part of the SQL query.