Updated README file.

Preview [here](https://gist.github.com/toqueteos/f755e7cf26a58847911d).
Hope you like it more this way.

Also this line:

> I've timed 10s initialization for 3.5 million characters on a modern CPU, and 10us search time (4000us with error-correction), so this system is capable of ~100,000 queries per second on a single processor.

Would be a lot better if you provided some benchs using [`testing.Bench`](http://golang.org/pkg/testing/), it's pretty straight forward to implement those inside a new file.

I believe you but others might not do the same.