Return raw color values in a tuple from ColorSensor.raw() (#171)

This is based on #169

Author: ddemidov

spec.json

@@ -1102,6 +1102,15 @@
                         "  - 7: Brown"
                     ]
                 },
+                {
+                    "name": "Raw",
+                    "sourceValue": [0, 1, 2],
+                    "type": ["int", "int", "int"],
+                    "requiredMode": "RGB-RAW",
+                    "description": [
+                        "Red, green, and blue components of the detected color, in the range 0-1020."
+                    ]
+                },
                 {
                     "name": "Red",
                     "sourceValue": [0],