update TODOs according to meeting
update TODOs according to meeting

jbripley/RxScala,hermanbanken/RxScala,zhongdj/RxScala,zjrstar/RxScala,samuelgruetter/RxScala,ReactiveX/RxScala,hermanbanken/RxScala,jbripley/RxScala,samuelgruetter/RxScala,TracyLu/RxScala,joohnnie/RxScala