First implementation of OperatorWeakBinding
merge remote-tracking branch 'netflix/master' into operator-weak-binding
OperatorWeakBinding supports predicates now
Some cleaning up
Guard the log calls
Forward subscription of wrapped subscriber
Rewrite AndroidObservableTest to test the new operator
Merge pull request #938 from soundcloud/operator-weak-binding

OperatorWeakBinding (deprecates OperatorObserveFromAndroidComponent)