Added mp3cat

input/stuff.md

@@ -15,4 +15,5 @@ for p in mpages:
 ### MacPorts Maintainer
 
 * **[cppcheck](https://trac.macports.org/browser/trunk/dports/devel/cppcheck/Portfile)** static code analysis
+* **[mp3cat](https://trac.macports.org/browser/trunk/dports/audio/mp3cat/Portfile)** read and write mp3 files