README.rdoc -> README.md

Fix Bundler warning ["README.rdoc"] are not files
Add cellphone match documentation
Merge pull request #2 from weppos/patch-1

README.rdoc -> README.md
Update dependencies.
Allow to override the default api key.

Now you can pass :api_key => "another_api_key" to any API method. For
example:

      user = Authy::API.register_user(:email => "email@example.com", :cellphone => "473-234-8877", :country_code => 1, :api_key => "api_key")
Add more specs.

The specs were restructured too.
Bump version.
Regenerate gemspec.
Remove typhoeus dependency.

It was replaced by httpclient which has less dependencies and work on
jruby.
Force token verification by default.

If params[:force:] is not given it defaults to force=true now.
This option enforces token verification even if the user has not
installed the application.
Bump version.

And regenerate the gemspec.
Specify version of httpclient dependency
Merge pull request #3 from Hebo/master

Specify version of httpclient dependency
Add try_convert which is missing in 1.8.7
Add try_convert. Fixes #5
Add Hash.try_convert too
Fixed Hash#try_convert implementation.

And moved core extensions to core_ext.rb file.
Bump version.
Add resquest_phonecall

This Authy::API method is responsible of the following endpoint
/protected/:format/call/:id
Add delete_user

This Authy::API method is responsible of the following endpoint
/protected/:format/users/delete/:id