Fixed keybindings template to work with turbolinks.

Turbolinks requires the JS to listen on the page:change event.
Adjusted source formatting to be compliant with existing one.
Merge pull request #7 from thierry-rietsch/master

Fixed the current version to work with turbolinks.
Added Mousetrap reset whenever keybindings get reloaded.

It is required to reset the Mousetrap.js library as turbolinks does not refresh the page. Therefore some old keybindings might still be present.
Merge pull request #8 from thierry-rietsch/master

Added Mousetrap reset whenever keybindings get reloaded.
Add contributors to readme