add toMap from Java Observable
add examples of toMap to RxScalaDemo

Added examples for all three overloads and removed newlines between
methods and docs
corrected implementation

Implementation corrected to not raise exceptions
Remove Redundant protectivelyWrap Method
Merge pull request #1015 from benjchristensen/safe-subscribe

Remove Redundant protectivelyWrap Method
unsubscribe before retry
Unsubscribe on retry using SerialSubscription
Merge pull request #1019 from benjchristensen/retry-1018

Fix: retry() never unsubscribes from source until operator completes
[Gradle Release Plugin] - pre tag commit:  '0.17.5'.
[Gradle Release Plugin] - new version commit:  '0.17.6-SNAPSHOT'.
Version 0.17.5
OperatorWeakBinding to not use WeakReferences anymore

related issues:
https://github.com/Netflix/RxJava/pull/1008
https://github.com/Netflix/RxJava/issues/1006
https://github.com/Netflix/RxJava/issues/979
isolate subscriber used for retries, cleanup tests
Benchmarking: Add JMH benchmark for ReplaySubject.
exclude tests

excluding out all tests until they stop hanging CloudBees
Restore rxjava-scala

Accidentally commented out while doing Java 8 builds (since Scala has issues with Java 8)
Fix NPE in SubjectSubscriptionManager
exclude tests

try that again
Merge pull request #1031 from benjchristensen/subject-npe

Fix NPE in SubjectSubscriptionManager
Merge pull request #1030 from daschl/subj-bench

Benchmarking: Add JMH benchmark for ReplaySubject.