Use handlebars-assets to move templates to their own directory.
Move routes to separate files.
Split up ember app into 'default' project structure.
Rename applicationButtons handlebars to application_view
Use a CollectionView for rendering the light controls
Change the 'turn off'-button from <a> to <button>.

An a-element does not support the 'disabled' attribute.
Various changes: Rename webapp to application, add SocketsAdapter.

The application is now a 'non-classic' Sinatra app where not everything
is in the Object namespace. Because of this, I had to introduce some
"Singleton-like" classes. Hopefully, I can refactor that into something
better.
Add basic feedback when a programme button is called.
Use CollectionView for programme buttons
Fix slider handle positioning
Reorder light_view columns.

The columns did not add up to 100% of the width in all cases.
Also, move the displayed intensity to the label/turn off block.