Add .jscrc for JavaScript Code Style help

JSCS is like JSHint, but specifically for Code Style.

It comes with a Google Code Style (which we use currently)
pre-set. This config file sets that and can be extended
later for any departures we make (if any) from that style
guide.

.jscsrc

+{
+  "preset": "google",
+  "excludeFiles": [
+    "node_modules/**",
+    "h/static/scripts/vendor"
+  ],
+  "maxErrors": 10
+}

package.json

@@ -24,6 +24,7 @@
     "uglify-js": "^2.4.14"
   },
   "devDependencies": {
+    "jscs": "^1.13.1",
     "karma": "^0.12.17",
     "karma-browserify": "^3.0.3",
     "karma-cli": "0.0.4",