Scheduler.inner() for Core
Scheduler.inner() for Language and Contrib Modules
inner() -> createInner()

See https://github.com/Netflix/RxJava/issues/997#issuecomment-40818768
degreeOfParallelism() -> parallelism()

https://github.com/Netflix/RxJava/issues/997#issuecomment-40819656
Merge pull request #1047 from benjchristensen/scheduler-0.18-with-inner

Scheduler Simplification