Explain how to setup other key bindings
Explain how to setup other key bindings

- This resolves GH-59

liuxuecheng/sublime-phpcs,kujiy/sublime-phpcs,kujiy/sublime-phpcs,liuxuecheng/sublime-phpcs,handrus/sublime-phpcs,michaelhogg/sublime-phpcs,ikappas/sublime-phpcs,appleboy/sublime-phpcs,michaelhogg/sublime-phpcs,ikappas/sublime-phpcs