Add control(Observable) to Reactor
Add pause/resume to Stream
Add cancel to Composable
Fix UriSelector matching
Delete Linkable from Reactor
Remove Linkable as non used anymore and confusing
new WindowAction on Stream,
new Lifecycle defines pause, resume, cancel
Registration, Composable and WindowAction now implement Lifecycle
Stream now accept an environment to be used by some action (e.g. window for its timer)