Refactor frontend JS

Refactored one.js into lib.js and open.js. lib.js contains all the common library functions
one.js and other page.js can use. open.js is the core engine that runs the web UI.

Frontend is now extensible by automatically including  lib.js and overriding default JS engine.

Use spaces instead of tabs.

Change-Id: Ia6678a81a23266c6d0e1c1d56c6cec547f792487
Signed-off-by: Andrew Kim <andrekim@cisco.com>