GCA JS Version 2.0 beta

GCA Async API Version: 2.0
The new API documentation is located here.

Main features:

• gca.js is now written in TypeScript, allowing type definitions
• Support for Promise API
• Added a graphical interface example
• Better integration with Electron.js

Limitations from version 1.x:

• Dropped support for multi-adapters
• Dropped support for polling an adapter. Now data must be read continuously.