2.1.14 release preparations

[akarnokd]

Version 2.1.14 - May 23, 2018 (Maven)

API changes

• Pull 5976: Add Single.concatEager().
• Pull 5986: Add ConnectableObservable.refCount() and ConnectableFlowable.refCount() with minimum consumer count & disconnect grace period.
• Pull 5979: Add Observable.throttleLatest and Flowable.throttleLatest().
• Pull 6002: Add MulticastProcessor.
• Pull 6010: Add assertValueSetOnly and assertValueSequenceOnly to TestObserver/TestSubscriber.

Deprecations

• Pull 5982: Deprecate getValues() in Subjects/FlowableProcessors to be removed in 3.x.

Documentation changes

• Pull 5977: Maybe/Single JavaDocs; annotation cleanup.
• Pull 5981: Improve JavaDocs of the subscribeActual methods.
• Pull 5984: Add blockingSubscribe JavaDoc clarifications.
• Pull 5987: Add marble diagrams to some Single.doOnX methods.
• Pull 5992: Observable javadoc cleanup.

Bugfixes

• Pull 5975: Fix refCount() connect/subscribe/cancel deadlock.
• Pull 5978: Flowable.take to route post-cancel errors to plugin error handler.
• Pull 5991: Fix switchMap to indicate boundary fusion.

Other changes

• Pull 5985: Cleanup in the Scheduler class.
• Pull 5996: Automatically publish the generated JavaDocs from CI.
• Pull 5995: Implement toString method for some Emitters.
• Pull 6005: JavaDocs HTML formatting and whitespace cleanup.
• Pull 6014: Fix & prevent null checks on primitives.