chore(release): 3.16.0 [skip ci]
chore(release): 3.16.0 [skip ci]

# [3.16.0](https://github.com/interfacewerk/iwerk-angular-ui/compare/v3.15.1...v3.16.0) (2019-03-24)

### Features

* **tree:** introduce the tree component ([ca1d4b7](https://github.com/interfacewerk/iwerk-angular-ui/commit/ca1d4b7))

interfacewerk/iwerk-angular-ui,interfacewerk/iwerk-angular-ui,interfacewerk/iwerk-angular-ui,interfacewerk/iwerk-angular-ui