Updated copyright year
Updated comments to JSDoc format

Renamed method name 'view' to 'show'

Added callback support for show/hide methods

Packed new version
Updated demo code with Webform-Toolkit integrated version

Removed inline HTML login example

Updated package file size

Added preview image to documentation

Replaced google.load() with include to the minimum supported version - 1.8.3
Added support for headless testing using Travis CI/PhantomJS/QUnit