Merge branch 'testing'

README.md

@@ -64,6 +64,10 @@ toolkit, OpenOffice/LibreOffice, Gecko, WebKitGtk, and KDE Qt toolkit.
 
 * **python-speechd**     - Python bindings for Speech Dispatcher (recommended)
 * **gstreamer-1.0**      - GStreamer streaming media framework (for sounds)
+* **piper-tts**          - Piper neural text-to-speech engine (optional)
+
+Piper voice models are typically stored under `~/.local/share/piper/voices` or
+`/usr/share/piper-voices`.
 
 ### Braille Support (Optional)