Add directions

[gavinhenderson]

• [x] Think about a better way to show slider
• [x] Enable auto update
• [x] Add a look length option to both
• [x] Add analytics
• [x] Test analytics offline
• [x] Put robotjs back in
• [x] Add look left
• [x] Add look right
• [x] Allow eye choice
• [x] Fix scrolling algorithm selector
• [x] Show the value on some slider
• [x] Allow different highlighting between algorithims
• [x] Add version number to about page