message: Mention surround.vim in the README
diff: @@ -10,6 +10,7 @@ VSCodeVim is a [Visual Studio Code](https://code.visualstudio.com/) extension th
  * Vim settings similar to those found in .vimrc
  * Multi-cursor support. Allows multiple simultaneous cursors to receive Vim commands (e.g. allows `/` search, each cursor has independent clipboards, etc.).
  * The EasyMotion plugin!
  +* The Surround.vim plugin!
  * And much more! Refer to the [roadmap](ROADMAP.md) or everything we support.
  Please [report missing features/bugs on GitHub](https://github.com/VSCodeVim/Vim/issues), which will help us get to them faster.
  