Adds the keywords field to package.json

Author: Cheton Wu (RD-TW)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "gcode-interpreter",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "A G-code interpreter for Node.js",
   "author": "Cheton Wu <cheton@gmail.com>",
   "homepage": "https://github.com/cheton/gcode-interpreter",
@@ -12,6 +12,10 @@
   "engines": {
     "node": ">=0.10.x"
   },
+  "keywords": [
+    "cnc",
+    "gcode"
+  ],
   "scripts": {
     "test": "gulp && gulp test",
     "coverage": "istanbul cover node_modules/mocha/bin/_mocha -- --require babel-core/register -R spec",