Release 4.11

This is a tracking issue for release 4.11.

**Please keep feature requests in their own issues**

If you want to make a comment on a particular change, please make the comment in the "Files changed" tab so comments are not lost during a rebase.

List of changes for release:
- [x] Deprecate `app.param(':name', fn)`, where `':name'` has the leading colon #2430 

**Testing this release**

If you want to try out this release, you can install it with the following command:
```bash
$ npm install visionmedia/express#4.11
```

Owners/collaborators: please do not merge this PR :)