Rx Design Guidelines & Specification

[benjchristensen]

Let's rewrite the Rx Design Guidelines as part of the reactivex.io site.

[martinfinke]

First off, thanks for this document! This issue is ~3 years old, but maybe it's the right place to post this: On page 5, last paragraph, it says:

Next it makes sure the event only gets fired after 250 milliseconds of activity by using the Throttle operator.

I think this should be inactivity?