Use ESLint

package.json

@@ -53,6 +53,8 @@
     "clean-css": "3.4.9",
     "coveralls": "2.11.6",
     "debounce": "^1.0.0",
+    "eslint": "v2.0.0-alpha-2",
+    "eslint-config-openlayers": "^1.0.0",
     "expect.js": "0.3.1",
     "gaze": "^0.5.1",
     "istanbul": "0.4.1",
@@ -68,6 +70,16 @@
     "slimerjs-edge": "0.10.0-pre-3",
     "wrench": "1.5.8"
   },
+  "eslintConfig": {
+    "extends": "openlayers",
+    "globals": {
+      "ol": false,
+      "goog": false
+    },
+    "rules": {
+      "no-multiple-empty-lines": [2, {"max": 3, "maxEOF": 1}]
+    }
+  },
   "ext": [
     "rbush",
     {