Update homepage to better advertise our sweet product

[iandioch]

The homepage only has a half a dozen sentences on what our product does - that doesn't really reflect the few months of work we've done adding in sexy features. It might be nice to mention things like email summaries, the plaintext endpoint, and bookmarking, go into a bit more detail on our methods, and spice it all up to sound really good and to sell our product well.

It was suggested we include a video demonstrating it - I'm not sure about that, but we can definitely explore our options.

Not only that, but we still say that "a Privacy Policy and Terms of Service will be provided soon". That's an easy fix.