commit a no-options Fade Out effect by Steve Daulton, re-naming from Pro Fade Out as that doesn't describe what it does

plug-ins/one-click-fade.ny

@@ -0,0 +1,24 @@
+;nyquist plug-in
+;version 1
+;type process
+;categories "http://lv2plug.in/ns/lv2core#MixerPlugin"
+;name "One-click Fade out"
+;action "Applying Fade..."
+;info "by Steve Daulton. (www.easyspacepro.com).\nReleased under GPL v2.\n"
+
+;; one-click-fade.ny by Steve Daulton July 2012.
+;; Released under terms of the GNU General Public License version 2:
+;; http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+;;
+;; Produce a professional sounding fade out.
+;; Applies a sinusoidal fade out with a progressive low-pass
+;; filter from full spectrum at start to 100 Hz at end.
+;;
+;; For information about writing and modifying Nyquist plug-ins:
+;; http://wiki.audacityteam.org/wiki/Nyquist_Plug-ins_Reference
+
+(lp 
+  (mult s 0.5 
+    (sum 1 
+      (osc (hz-to-step (/ (get-duration 2))) 1 *table* 90)))
+ (pwlv (/ *sound-srate* 2) 1 100))