Integration of general Melange JS utilities in base template.

General JavaScript utilities for melange. This script is going to be the core of Melange JS. It provides a melange namespace and general utilies for logging, loading of google api, common errors, base class for templates that reads context from a script tag attribute. It also reads general options from its script tag.

Once a task has been approved it can no longer be unapproved. Patch by: Madhusudan C.S. and Lennard de Rijk