Made a prettier (?) Web site.
Implemented the "Clear all" button.

Also, fixed a typo.
Fixed annoying gray-on-gray text.
Show info about light status when socket.io connection fails.

Also prevent zooming on phones, so that rapid button presses do not
get interpreted as a zoom command.
Added ability to disable the Web socket with an enivornment variable.
Fix broken light toggle functionality.
Longer, more playful default sequence.

Colors on the web page now match the physical configuration of the lights.