Shortened too long descriptions.

src/dsp/node_allp.rs

@@ -29,7 +29,7 @@ impl AllP {
         "AllP sig\nThe output of allpass filter.\nRange: (-1..1)";
 
     pub const DESC : &'static str =
-r#"Simple Single Allpass Filter
+r#"Single Allpass Filter
 
 This is an allpass filter that can be used to build reverbs
 or anything you might find it useful for.

src/dsp/node_noise.rs

@@ -51,7 +51,7 @@ impl Noise {
         "Noise sig\nThe noise output.\nRange: (-1..1)";
 
     pub const DESC : &'static str =
-r#"A Simple Noise Oscillator
+r#"Noise Oscillator
 
 This is a very simple noise oscillator, which can be used for any kind of audio rate noise.
 And as a source for sample & hold like nodes to generate low frequency modulation.