Editor Support Docs

[Zack Charter]

There is a LilyPond bundle for the OS X editor TextMate. I thought you might
 like to add it to the supported editors page. 
(http://lilypond.org/doc/v2.10/Documentation/user/lilypond/Editor-
support#Editor-support)

You can install it (if you have subversion) by running this:

mkdir -p /Library/Application\ Support/TextMate/Bundles
cd /Library/Application\ Support/TextMate/Bundles
svn co http://macromates.com/svn/Bundles/trunk/Bundles/Lilypond.tmbundle/

Sorry if this is the wrong address to send docs fixes to.