Mostly spans with divs as children, as well as writing
checked='true' instead of just checked.

All of the entities are rendered to the canvas. It only renders images, so there are no
names, height bars, etc.

Entities now have their templates cloned (by serializing and parsing) to allow for
a single object to be passed in repeatedly.

This reverts commit 4c58eb9b94.

This reverts commit 7182f0479e.

Still very rough around the edges...

The viewport attribute is now set, which should make mobile devices show it a bit
more correctly. I updated the bottom-names to be placed properly on mobile.

Very large entities are confusing to add - they appear for a brief moment
and then grow off the screen. This shows an arrow if an entity is at least
ten times taller than the viewport.