Styling Device Detection Tool

Styling Device Detection Tool
- Redesign the header & footer part
- Need to figure out how to add shadows on selected device instead of
using outline
- Center align 'Loading...' text & add padding-top of 333px

Questions
- Can I change the color value on 'tree-longBranches.js' &
'tree-map.js'?
- Can we change the 'Loading...' text to GIF?