Updated md file.

Author: lizlooney

external_samples/docs/component_blocks.md

@@ -0,0 +1,34 @@
+# Component Blocks
+
+## Block Details
+
+### Dropdown shows list of component of the specific type
+
+<img src="BlockWithComponentDropdown.png">
+
+### Tooltip shows that this block calls a method on a component and details about what that method does.
+
+<img src="BlockWithTooltip.png">
+
+## Component Toolbox Categories
+
+### REV ColorRangeSensor
+
+<img src="REV_ColorRangeSensor.png">
+
+### REV Servo
+
+<img src="REV_Servo.png">
+
+### REV SmartMotor
+
+<img src="REV_SmartMotor.png">
+
+### REV TouchSensor
+
+<img src="REV_TouchSensor.png">
+
+### SparkFun LEDStick
+
+<img src="SparkFun_LEDStick.png">
+