RxJavaMath Versions Save

This is the first release after splitting from RxJava into its own top level project RxJavaMath.

This is the same code as version 0.20.4 except:

• all deprecated methods and types are deleted
• now published to groupId io.reactivex instead of com.netflix.rxjava

io.reactivex:rxjava-math:0.21.0

The artifacts can be found on maven Central at: http://repo1.maven.org/maven2/io/reactivex/rxjava-math

Artifacts: Maven Central

Last release as submodule of of RxJava: https://github.com/ReactiveX/RxJava/releases/tag/0.20.4