RxScala: Add more operators to match RxJava
RxScala: Mark superfluous from/empty methods with scheduler parameter as deprecated
Handle Fatal Exceptions

They were being swallowed before this fix when doOn* operators were used.
Merge pull request #1631 from benjchristensen/doOnEach-error-swallowing

Handle Fatal Exceptions
Merge pull request #1625 from jbripley/rxscala-deprecate-scheduled-methods

RxScala: Mark superfluous from/empty methods with scheduler parameter as...
Merge pull request #1623 from zsxwing/rxscala-operators

RxScala: Add more operators to match RxJava
CompositeException

- reverting to version that just does printStackTrace
- see https://github.com/ReactiveX/RxJava/issues/1405
printStackTrace and getCause implementation

The printStackTrace and getCause implementations have different approaches to handling circular references.
If on a JVM where printStackTrace is called directly, the full causal chain will always be printed. If on one such as Dalvik
where getCause is invoked directly then it will cut the causal chain if it sees a duplicate.
Merge pull request #1632 from benjchristensen/composite-exception

Composite Exception - Circular Reference Handling
[Gradle Release Plugin] - pre tag commit:  '0.20.1'.
[Gradle Release Plugin] - new version commit:  '0.20.2-SNAPSHOT'.
0.20.1
Javadoc enhancements for new CompositeException implementation (mostly formatting).
Optimize single BlockingObservable operations

Backport from 1.x to 0.20.x of #1635
Merge pull request #1637 from benjchristensen/backport-blockingobservable-single-to-0_20

Optimize single BlockingObservable operations
[Gradle Release Plugin] - pre tag commit:  '0.20.2'.
[Gradle Release Plugin] - new version commit:  '0.20.3-SNAPSHOT'.
0.20.2
RxScala: Fix recursive onStart call in Subscriber
Deprecate ParallelMerge

Removing in 1.0 as it is confusing and rarely useful.