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retryWhen/repeatWhen
Add retryWhen example to Javadoc
Merge pull request #1493 from benjchristensen/retry_repeat-when

Manual merge of retryWhen/repeatWhen
zipWith
Merge pull request #1494 from benjchristensen/zip-with

zipWith
adding @since annotations, a few other touch-ups to javadocs of new operators
using a <dl> will make the "Scheduler" and "Backpressure Support" sections fit into the javadoc format more effectively
Update JCTools Code
Reverting use of JCTools Until Problem Is Solved
Merge pull request #1496 from benjchristensen/ring-buffer

Change RxRingBuffer Queue Usage
Merge pull request #1495 from puniverse/master

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spsc ring buffer concurrency test
Merge pull request #1497 from benjchristensen/ring-buffer

spsc ring buffer concurrency test
non-deterministic testUserSubscriberUsingRequestAsync

fix non-deterministic failures of BackpressureTests.testUserSubscriberUsingRequestAsync

I was able to replicate the occasional failure by putting it in a tight loop. With these changes it no longer fails.
Merge pull request #1498 from benjchristensen/testUserSubscriberUsingRequestAsync

non-deterministic testUserSubscriberUsingRequestAsync
retrytest.iterativeBackoff

Unable to replicate failure of this test ... but adding assertNoErrors so we can see an exception if it happens again.
Merge pull request #1499 from benjchristensen/retryTest-iterativeBackoff

retrytest.iterativeBackoff
blocking synchronous next

Fixes https://github.com/Netflix/RxJava/issues/624
Eliminate duplication of List in toList

Fixes https://github.com/Netflix/RxJava/issues/1218