Added comparison program for different floating point conversions

ColorConvertBenchmark/ColorConvertBenchmark.ino

@@ -0,0 +1,23 @@
+void setup() {
+
+}
+
+void loop() {
+  convert1(129);
+  convert2(129);
+  convert3(129);
+}
+
+
+int convert1(int color_in) {
+  return 4096 / ( 256 / color_in);
+}
+
+int convert2(int color_in) {
+  return color_in << 4;
+}
+
+int convert3(int color_in) {
+  return (int) (4096 / ( 256 / (float) color_in));
+}
+