adding list + update
Merge branch 'master' of https://github.com/natebrennand/twilio-go into voice
adding list calls and test app
updating update and adding a test
Merge branch 'master' of https://github.com/natebrennand/twilio-go into voice
moving update things to update file
adding test for building call list
removing silliness
Merge pull request #18 from natebrennand/voice

update + list