Update API to support 14th of May changes

Details at https://dev.twitter.com/blog/api-housekeeping

Changes to carry out urgently in both 7.x-3.x and 6.x-3.x versions:

• All non-versioned API endpoints, such as http://twitter.com/statuses/user_timeline.xml, will cease functioning and you'll need to use the proper endpoints instead. See the deprecated methods for more.
• All previously announced-as-deprecated methods will cease accepting requests.
• GET statuses/public_timeline will also be deprecated. Please use the Streaming API's sample endpoint to obtain a sampling of public tweets.
• OAuth 1.0A operations must be performed on the api subdomain. Older http://twitter.com/oauth/* paths will cease to be functional.
• Atom is being removed on all methods currently supporting it as an output format due to disuse. RSS will remain available on these methods.
• All API methods capable of including Tweet Entities will return them regardless of the value provided by include_entities=true
• All API methods capable of including retweets will return them regardless of the value provided by include_retweets=true
• All methods currently supporting cursoring or usage of since_id and max_id will remove support for "classic" pagination through the "page" parameters. See Working with Timelines for more information.