Provide module settings in drupalSettings object

Problem/Motivation

I need to access the AdWords ID from JS. Adding it to the drupalSettings object would be helpful.

Proposed resolution

In the google_adwords_lite_page_attachments() hooke, add a simple object that contains the AdWords ID (for a start) to drupalSettings. This way, you can also determine whether the module is active (through the existance of the object).