Chain Subscription in TimeoutSubscriber and SerializedSubscriber
Reimplement the ElementAt operator
Add ElementAt and ElementAtOrDefault to rxjava-scala
Implement ElementAt as Operator
Pivot Operator
Merge pull request #982 from benjchristensen/pivot

Pivot Operator
Pivot Unit Test
Add Javadoc to Pivot
Merge pull request #984 from benjchristensen/pivot-concurrency

Tests and Javadoc for Pivot
add marble diagrams to pivot() javadocs
Merge pull request #966 from zsxwing/elementAt

Reimplement the ElementAt operator and add it to rxjava-scala
Merge pull request #965 from zsxwing/fix-timeout-unsubscribe

BugFix: Chain Subscription in TimeoutSubscriber and SerializedSubscriber
Fix SynchronizedObserver.runConcurrencyTest

It wasn't waiting on all threads before emitting onCompleted.
Merge pull request #986 from benjchristensen/issue-985

Fix SynchronizedObserver.runConcurrencyTest
Fix Non-Deterministic Pivot Test

This failed on build servers (small, slow, single or dual-core machines).
Merge pull request #987 from benjchristensen/pivot

Fix Non-Deterministic Pivot Test
OnErrorFailedException

Re-throw when onError throws an Exception.
This fixes https://github.com/Netflix/RxJava/issues/969
Merge pull request #988 from benjchristensen/issue-969

OnErrorFailedException
[Gradle Release Plugin] - pre tag commit:  '0.17.2'.
[Gradle Release Plugin] - new version commit:  '0.17.3-SNAPSHOT'.