* Add yarn.lock to .gitignore
* Extract available shapes to one place
* Add event listeners for shapes shortcuts
* fixup! Add event listeners for shapes shortcuts
* Underline first letter of shapes
to indicate interactivity
* fixup! Extract available shapes to one place
* fixup! Add event listeners for shapes shortcuts
* add package-lock.json to gitignore as project appears to use yarn
* add support for deleting elements with "delete" key + assign magic numbers and keycode values to named properties
David Luzar