Work towards warc2zim reading

[Jaifroid]

This is more on track than previous attempts, though not working yet.

It achieves the following:

• Loads the replay_iframe inside our iframe, with the src set to the requested document with a rewritten URL like http://localhost:8080/kiwix-js/zim_name.zim/C/A/mp_/https://example.com/requested_document/ (all done from within the replayWorker);
• The reuquest for above URL is caught by our service worker and passed back to the replayWorker;
• ReplayWorker parses that URL and reads the header from our backend;
• A response is returned to the Service Worker. Our Service Worker returns the response, at which point we get an abrupt "not found" in console.log.

So, it's progress (painstaking), but missing something vital.

[Jaifroid]

Now loading HTML and correctly parsing CSS and most images except those that are dynamically constructed or called by JS / lazy loading.

The issue appears to be that wombat.js has not been added as pre-processor. But this is much better than anything I've tried before.

[Jaifroid]

All issues now fixed in both modes.