message: Remove outdated warning about the version change.
diff: [![Join the chat at https://gitter.im/HowardHinnant/date](https://badges.gitter.im/HowardHinnant/date.svg)](https://gitter.im/HowardHinnant/date?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
  <hr/>
  -IMPORTANT UPDATE:
  -
  -Recently IANA changed how they reported the database version. If you have `AUTO_DOWNLOAD` enabled in the tz library, you must update to include this commit:
  -
  -https://github.com/HowardHinnant/date/commit/19c83e47ed411a45e0b5a45d772c47c6ee23ac3f
  -
  -Without this update your tz lib will download a new copy of the database everytime you start your program.
  -<hr/>
  _**[Try it out on wandbox!](http://melpon.org/wandbox/permlink/PodYB3AwdYNFKbMv)**_
  This is actually several separate C++11/C++14 libraries:
  