Moving rxscala.github.io to reactivex.io

[reactivex]

Moving rxscala.github.io to reactivex.io

[flatmap13]

@samuelgruetter Thank you for making this available, I'll look into integrating this on the website.
The plan is to have all code examples for the website in the project repos, and to load them dynamically onto the website. Currently, RxScala already contains some examples for the website but more will be added as we go. This way we can ensure that all code examples are directly runnable and that they can break the build (i.e. stay current).

[samuelgruetter]

Cool! Btw there are already one or several examples for each operator in RxScalaDemo. Once the build infrastructure works, we can start moving them to src/examples/reactivex/getting-started.

[flatmap13]

I've moved the content to the reactivex.io/rxscala; see #41.
Later we will expand/update the content and fix the layout of the comparison table.

[staltz]

Nice :)

[samuelgruetter]

Nice, thank you @GeorgiKhomeriki. I'll open a new issue for the comparison table.