Fix incorrectly calling perlin noise "Simplex Noise"

Simplex noise is something different and is not implemented by the
FastLED library (yet!). Therefore, don't confuse people by calling it
Simplex Noise.

Author: aykevl

examples/NoisePlusPalette/NoisePlusPalette.ino

@@ -15,7 +15,7 @@ const bool    kMatrixSerpentineLayout = true;
 
 // This example combines two features of FastLED to produce a remarkable range of
 // effects from a relatively small amount of code.  This example combines FastLED's 
-// color palette lookup functions with FastLED's Perlin/simplex noise generator, and
+// color palette lookup functions with FastLED's Perlin noise generator, and
 // the combination is extremely powerful.
 //
 // You might want to look at the "ColorPalette" and "Noise" examples separately

src/noise.h

@@ -9,11 +9,11 @@ FASTLED_NAMESPACE_BEGIN
 /// Noise functions provided by the library.
 
 ///@defgroup Noise Noise functions
-///Simplex noise function definitions
+///Perlin noise function definitions
 ///@{
 /// @name scaled 16 bit noise functions
 ///@{
-/// 16 bit, fixed point implementation of perlin's Simplex Noise.  Coordinates are
+/// 16 bit, fixed point implementation of Perlin's noise.  Coordinates are
 /// 16.16 fixed point values, 32 bit integers with integral coordinates in the high 16
 /// bits and fractional in the low 16 bits, and the function takes 1d, 2d, and 3d coordinate
 /// values.  These functions are scaled to return 0-65535
@@ -34,7 +34,7 @@ extern int16_t inoise16_raw(uint32_t x);
 
 /// @name 8 bit scaled noise functions
 ///@{
-/// 8 bit, fixed point implementation of perlin's Simplex Noise.  Coordinates are
+/// 8 bit, fixed point implementation of Perlin's noise.  Coordinates are
 /// 8.8 fixed point values, 16 bit integers with integral coordinates in the high 8
 /// bits and fractional in the low 8 bits, and the function takes 1d, 2d, and 3d coordinate
 /// values.  These functions are scaled to return 0-255