Alpha: Lazy-load sections

Changes:
* Remove code relating to lazy loading pages via history api for time being -- too buggy
* Remove random module
* Adjust languages code to avoid interference with inline style scrubber

In removal of javascript page loads
Makes the following bugs invalid:
* Bug 44081
* Bug 46972
* Bug 43626
* Bug 44562
Fixes following bugs:
* Bug 44691

Change-Id: I770c84384593ce96e57cb2be6e0c12aed99e5eeb
Merge "Alpha: Lazy-load sections"