Mutation observer

[vadymus]

Please review MutationObserver-based implementation (but optionally to be triggered by any preferred method). Note: Andrei will fix extension build because I get an error.

Purpose of Receiver: to integrate Adobe Target functionality in any SPA framework

• Installation: below code should be placed right after at.js library
• Usage: adobe.target.ext.universal.receiver();

Purpose of Router: to implement Adobe Target in any SPA framework by triggering Mbox calls via CustomEvent;

• this is an optional extension for quick and simple implementation that goes with "Receiver" extension;
• the extension listens for any DOM changes from MutationObserver and passes Mbox call data via CustomEvent;
• you may want to use your own implementation instead to trigger Mbox calls, eg.: trigerring with data element update.
• For your own implementation, use this call where needed:
• var event = new CustomEvent('atx-target-call-ready',{detail: {mbox: 'target-global-mbox'} });document.dispatchEvent(event);
• Installation: below code should be placed right after at.js library and Universal "Receiver" extension
• Usage: adobe.target.ext.universal.router([mbox1ConfigObj,mbox2ConfigObj]);

[XDex]

As discussed, please scaffold the extension again using the updated generator-adobe-target-atjs-extension so that node_modules won't get committed to Git, and then submit a new PR.. Thanks!