[racket-dev] Release Announcement for v6.1

On 2014-07-28 14:33:07 -0400, Ryan Culpepper wrote:
> asumu:
> - removed mzlib/class100 (5711e900)
> - classes and TR (various)

I don't have anything in particular for classes.

For TR, we should add Stephen's contribution of async-channel support:

  * Typed Racket now supports asynchronous channels using the
    `typed/racket/async-channel' library.

I also added a new syntax for asymmetric filters. Is that worth
including? (and the filter syntax is now documented)

Cheers,
Asumu