V1.0

* New text for the home page
* Announcement
* Extracted install instructions from getting started

/cc @alco @ericmj please review!
Why not Fiber?
> In computer science, a fiber is a particularly lightweight thread of execution.
http://en.wikipedia.org/wiki/Fiber_%28computer_science%29

Even the Wikipedia article on Thread ties it to OSes in the first paragraph and to hardware threads in the second one. There will still be confusion among those who won't bother reading up on processes. But the decision is up to you, neither term is objectively better for the minds of uninitiated.