Issue #511 - added free to reslove memory leaking warnings
Issue #511 - added free to reslove memory leaking warnings

cfraz89/RxSwift,kzaher/RxSwift,KyoheiG3/RxSwift,ReactiveX/RxSwift,ReactiveX/RxSwift,cfraz89/RxSwift,shiratsu/RxSwift,KyoheiG3/RxSwift,ReactiveX/RxSwift,kzaher/RxSwift,tottakai/RxSwift,shiratsu/RxSwift,KyoheiG3/RxSwift,shiratsu/RxSwift,cfraz89/RxSwift,kzaher/RxSwift,kzaher/RxSwift,tottakai/RxSwift,tottakai/RxSwift,cfraz89/RxSwift