Adding "measuring stick" tool, for quickly measuring out 64-LED strips

tools/measuring_stick/measuring_stick.ino

+/*
+ * Measuring Stick - a quick tool for measuring out 64-LED strips.
+ *
+ * This is a TeensyDuino sketch which lights the first 64 LEDs
+ * on a strip. LEDs 0, 10, 20, 30, 40, 50, and 60 are green,
+ * the others are dim white. The entire strip is kept dim enough
+ * that this can be used as a battery-powered device that you can
+ * plug into LED strips while you work with them.
+ */
+
+ #include <OctoWS2811.h>
+
+const int ledsPerStrip = 128;
+DMAMEM int displayMemory[ledsPerStrip*6];
+int drawingMemory[ledsPerStrip*6];
+
+OctoWS2811 leds(ledsPerStrip, displayMemory, drawingMemory, WS2811_GRB | WS2811_800kHz);
+
+void setup() {
+	leds.begin();
+
+	for (int i = 0; i < ledsPerStrip; ++i)
+		leds.setPixel(i, 0x000000);
+
+	for (int i = 0; i < 64; ++i)
+		leds.setPixel(i, 0x101010);
+
+	for (int i = 0; i < 64; i += 10)
+		leds.setPixel(i, 0x104010);
+}
+
+void loop() {
+	leds.show();
+}
+