Add rx support to hystrix-clj.

[daveray]

Add observe, observe-later, and observer-later-on functions to
hystrix-clj corresponding to observe(), toObservable() and
toObservable(Scheduler) methods added to Hystrix respectively.

I'm wondering whether the toObservable methods really need to be wrapped, or if they're sufficiently fringe that they should be left out to keep the wrapper light. Thoughts?

[cloudbees-pull-request-builder]

Hystrix-pull-requests #42 ABORTED

[josephwilk]

Ah, I was just thinking about this, missed the PR. I'll cancel mine.

I realise now that what I really wanted was observe-later not observe. Look forward to this being merged.

[daveray]

@josephwilk Cool. What do you thinkg of the name observe-later? We were just discussing this last week trying to guess under what conditions someone would choose to use that form and whether the name made sense.

[josephwilk]

I like observe-later, its intent and difference from observe was very clear to me.

Also works nicely with observe-later-on

[daveray]

Thanks!

[benjchristensen]

Merged and released in 1.3.1

[daveray]

Thanks Ben! Hopefully it works :)