This requires some hacks, documented in
https://docs.google.com/document/d/1nNebWTiLzz5ePcit_bjZPtaiSIFU4EsQKUlX7LX0c0A/edit
Changes:
- include subtyping info in angular2.d.ts by adding 'extends supertype'
- export missing symbols needed transitively by angular2/angular2
- because of decorator/annotation mismatch, we can't export these to applications.
So I've added a separate angular2.api.ts file to re-export specifically to .d.ts
generation.
- Hack to remove aliases introduced by 'import * as alias' syntax
- Hack to deal with Error still an interface
note that we require users to install the transitive dependencies - this is how TSD works.