Handle new HTTPS-friendly media URLs.
Support deleting/releasing phone numbers via IncomingNumbers.Release(ctx, sid).
Initial support for the Pricing API (https://pricing.twilio.com).
Add an AUTHORS.txt.
Add Recordings.GetTranscriptions() to get Transcriptions for a recording. The Transcriptions resource doesn't support filtering by Recording Sid.
Add Alert.StatusCode() function for retrieving a HTTP status code (if one exists) from an alert.
Copy url.Values for GetXInRange() functions before modifying them.
Implement GetNextConferencesInRange
Implement GetConferencesInRange. Fix paging error in GetCallsInRange/GetMessagesInRange.
Implement GetNextXInRange - if you have a next page URI and want to get an Iterator (instead of starting with a url.Values).
Fix go 1.6 (messages_example_test) relied on the stdlib Context package by accident.
Support filtering Calls/Messages down to the nanosecond in a TZ-aware way, with Calls.GetCallsInRange / Messages/GetMessagesInRange.
Add more Description fields based on errors I've received in the past. There are probably more to be found, but this is a good start.
Use the same JWT library instead of using two different ones.
Add Description() for Alert bodies.
Fix next page URL's for Twilio Monitor
The data in Update() requests was silently being ignored. They are not ignored any more.
Support the Accounts resource.
Add RequestOnBehalfOf function to make requests on behalf of a subaccount.
Fixes short tests that were broken in 0.38
Support Outgoing Caller ID's
Support Keys
Added Ended(), EndedUnsuccessfully() helpers to a Call, and FriendlyPrice() to a Transcription.