Rewrite api-site markup based on bootstrap3 and jquery 1.10.2

- Completely refactored markup for all pages
- Switched to a static left rail menu
- Made use of bootstrap3 default responsive layout
- cleaned up client javascript

Change-Id: I3b1f16cdc2d60f90b49f90aa231288efb4e4b201
Author: Ken Perkins
Merge "Rewrite api-site markup based on bootstrap3 and jquery 1.10.2"