adding color

libs/color/pxt.json

@@ -0,0 +1,4 @@
+{
+    "additionalFilePath": "../../node_modules/pxt-common-packages/libs/color",
+    "hidden": true
+}

libs/light/pxt.json

@@ -2,6 +2,7 @@
     "additionalFilePath": "../../node_modules/pxt-common-packages/libs/light",
     "public": true,
     "dependencies": {
-        "core": "file:../core"
+        "core": "file:../core",
+        "color": "file:../color"
     }
 }

pxtarget.json

@@ -12,6 +12,7 @@
         "libs/bluetooth",
         "libs/servo",
         "libs/radio-broadcast",
+        "libs/color",
         "libs/light"
     ],
     "cloud": {