Add a CRGB macro

The `CRGB` macro takes rgb values as arguments, in this order, and creates a
`cRGB` instance with the components rearranged to fit the ordering of the
hardware (in the case of the Model01, bgr).

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

src/Kaleidoscope-Hardware-Model01.h

@@ -8,6 +8,8 @@
 #define COLS 16
 #define ROWS 4
 
+#define CRGB(r,g,b) (cRGB){b, g, r}
+
 class Model01 {
   public:
     Model01(void);