Added *.swp files to .gitignore (vim temporary files).
Addd support for Authy's phone services.

New 3 methods: `verification_start`, `verification_check` and `info`
were added to support authy's phone verification and info services.

Usage:

  authy.phones().verification_start({
      via: "sms",
      country_code: "1",
      phone_number: "111-111-1111"
    }
  );

  authy.phones().verification_check({
      country_code: "1",
      phone_number: "111-111-1111",
      verification_code: "0000"
    }
  );

  authy.phones().info({
      country_code: "1",
      phone_number: "111-111-1111"
    }
  );
Code refactoring, added method to create requests.

A new method `_request` was created to handle GET and POST requests.
This allows us to remove repeated code and improve readability.
Added method for user status end point.

User status returns the status of a user given the id. A new method
`user_status` along with tests were added to support this end point.
Added docs for new methods in README.

Documentation for the new methods were added:

- start phone verification
- check phone verification
- phone info
- user status
Updated phone verification/info methods.

Phone verification methods were modified to accept individual parameters
instead of an options object.
Merge pull request #10 from authy/master

Support for new end points.