Mention the ZSH support for git-flow-completion.

README.mdown

@@ -44,19 +44,14 @@ favorite package manager to install `getopt`.  For Cygwin, install the
 
 Integration with your shell
 ---------------------------
-For those who use the [Bash](http://www.gnu.org/software/bash/) shell, please
-check out the excellent work on the
+For those who use the [Bash](http://www.gnu.org/software/bash/) or
+[ZSH](http://www.zsh.org) shell, please check out the excellent work on the
 [git-flow-completion](http://github.com/bobthecow/git-flow-completion) project
 by [bobthecow](http://github.com/bobthecow). It offers tab-completion for all
 git-flow subcommands and branch names.
 
-If you are a [zsh](http://www.zsh.org) user with some plugin-writing
-experience, please help us develop a
-[completion plugin](http://github.com/bobthecow/git-flow-completion/issues#issue/1)
-for zsh, too.  Please contact me on [Github](http://github.com/inbox/new/nvie)
-or [Twitter](http://twitter.com/nvie) to discuss details.
-
-For Windows users, [msysgit](http://code.google.com/p/msysgit/) is a good starting place for installing git.
+For Windows users, [msysgit](http://code.google.com/p/msysgit/) is a good
+starting place for installing git.
 
 
 Please help out