Browse/search functions.

Here are couple of functions I've written for handling basic web tasks. Some of it is mainly Darwin targeted, but the idea would be to move/refactor the stuff in help.fish and make ```help``` a client of ```browse```.

Something to keep hacking on?

![Screenshot.](https://f.cloud.github.com/assets/3162811/1322074/14a9b6a8-3410-11e3-9d82-e9cc2912d8a9.jpg)