message: Cleanup Tutorial Example (tuto-01-getting-started.md)
  The final example in the tuto-01-getting-started.md doesn't compile.
  It's missing a use statement Surface.
  I added a use for Surface.  Additionally, I added 'extern crate glium'
  at the top of the example.  Finally, I removed the 'mut' for the
  event_loop as it seems to be unnecessary.
diff: @@ -115,10 +115,12 @@ This call to `finish()` means that we have finished drawing. It destroys the `Fr
  Here is our full `main` function after this step:
  ```rust
  +extern crate glium;
  +
  fn main() {
  - use glium::glutin;
  + use glium::{glutin, Surface};
  - let mut event_loop = glutin::event_loop::EventLoop::new();
  + let event_loop = glutin::event_loop::EventLoop::new();
  let wb = glutin::window::WindowBuilder::new();
  let cb = glutin::ContextBuilder::new();
  let display = glium::Display::new(wb, cb, &event_loop).unwrap();
  