Release 0.6.0

Release 0.6.0 (#77)

* Update README to add documentation to use .xcworkspace after pod install

* Use sha256 hash instead of md5 hash algo

Release 0.5.0

* Add documentation to support AP02 region
* Add API `getUUID` to get `td_uuid`

Release 0.4.0

Version 0.4.0

Release 0.3.0

Added support for Profile API (fetchUserSegments)

0.2.0

• Added ability to automatically tracking IAP events.
• Added API reference (https://treasure-data.github.io/td-ios-sdk)
• Several inner refactors and code cleanup.