message: Remove airline sentence from README.
diff: @@ -6,9 +6,6 @@ What Is It?
  Upterm (formerly Black Screen) is an IDE in the world of terminals. Strictly speaking, it's both a
  terminal emulator and an *interactive* shell based on [Electron](http://electron.atom.io/).
  -Also, unlike most of the emulators you can meet nowadays it uses HTML and CSS for its UI (exactly as Atom does),
  -which means we can [stop misusing unicode characters](https://github.com/vim-airline/vim-airline)
  -and make a better looking terminal with appropriate tools.
  ![](README/main.png)
  