update RxJava to RxScala comparison table to RxScala 0.23.0
update RxJava to RxScala comparison table to RxScala 0.23.0

BattleShipPark/reactivex.github.io,phajduk/reactivex.github.io,ReactiveX/reactivex.github.io,carlosypunto/reactivex.github.io,carlosypunto/reactivex.github.io,BattleShipPark/reactivex.github.io,zsxwing/reactivex.github.io,ReactiveX/reactivex.github.io,ReactiveX/reactivex.github.io,phajduk/reactivex.github.io,phajduk/reactivex.github.io,zsxwing/reactivex.github.io,BattleShipPark/reactivex.github.io,zsxwing/reactivex.github.io,carlosypunto/reactivex.github.io