* Fix tree-shaking of recursive functions and other cases ([#1120](https://github.com/rollup/rollup/issues/1120), [#1142](https://github.com/rollup/rollup/issues/1142))
* Support module names that require quotes ([#582](https://github.com/rollup/rollup/issues/582), [#584](https://github.com/rollup/rollup/issues/584))