Missing link for bug traker

[DartBot]

<img src="https://avatars.githubusercontent.com/u/5840555?v=3" align="left" width="96" height="96"hspace="10"> Issue by bwilkerson
Originally opened as dart-lang/sdk#21561

---

It would be great if I could go to a package's page and find a link to either the issue tracker used for that package or the github page for that package.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/405837?v=3" align="left" width="48" height="48"hspace="10"> Comment by zoechi

---

similar to http://dartbug.com/20676