Revert "Pop branch tweaks (nav bar, colors)"

This reverts commit 599cfa14bf315bb6e0ac3b626877c517f2540086.
Revert "Revert "Pop branch tweaks (nav bar, colors)""

This reverts commit e4e93b0920a5f25b345a569b38c0879ac33bec1c.
Revert "WEB-ICE - removed XML & GIFs (causing GAE deployment issues)"

This reverts commit cb50f0dcfe175bab4c0937d251f3fe470416f394.
Adding back /data folder and Web-Ice images (testing skip_files in app.yaml)