Remove badge
Merge pull request #6 from Indiv0/remove-extra-badge

Remove Badge from Example
Update for latest piston
Update readme to use the updated code
Merge pull request #7 from maxsnew/latest-piston

Update for latest piston
Switch to sdl2 and rename main file.
Updated readme to use sdl2 instead of glfw.

This doesn't chage the text because I'm writing a tool to do that
automatically.
Use a markdown preprocessor to keep code examples up to date.

Running `cargo run` will compile the tutorial `.dev.md` file
to a regular `.md` file for viewing.
update for recent piston build