Tobias Bosch 0ae77753f3 fix(core): always remove DOM listeners and stream subscriptions
This is needed to prevent memory leaks. The DOM
listeners don’t need to be removed for simple examples,
but a big internal app shows memory leaks because of them.

BREAKING CHANGE:
- `Renderer.listen` now has to return a function that
  removes the event listener.
2016-01-26 07:37:31 -08:00
..
2016-01-04 19:25:32 +00:00