Implement SEO and path handling on web

[kkoreilly]

We need to figure out a good way to handle URLs on web and have good SEO for sites. #701 is related.

[kkoreilly]

Also, we still need to implement scrolling on mobile web.

[kkoreilly]

And zooming.

[kkoreilly]

I implemented scrolling on mobile web a while ago, but zooming is still not implemented.

[kkoreilly]

Path handling has already been improved on web.

[kkoreilly]

Here is a key potential innovation: once we implement a reasonable HTML generator for SEO purposes, we could also easily use the same HTML as a preview for apps before they load. It would only take a small amount of simple CSS generation to make this viable, especially for text content. I think that would significantly ameliorate one of the biggest issues with web, which is the long load times, especially for static content like blogs. If you can start reading the blog while it loads with a decent experience and then get the full experience after it loads, I think that could potentially be very good and not too difficult to implement.