Add eslint

.eslintrc

@@ -0,0 +1,3 @@
+{
+  "extends": "eslint-config-unstyled"
+}

package.json

@@ -4,8 +4,15 @@
   "description": "Utilities and tilelive integration for the MBTiles format.",
   "url": "http://github.com/mapbox/node-mbtiles",
   "author": "Mapbox (https://www.mapbox.com)",
-    "keywords": ["map", "mbtiles"],
-    "licenses": [{ "type": "BSD" }],
+  "keywords": [
+    "map",
+    "mbtiles"
+  ],
+  "licenses": [
+    {
+      "type": "BSD"
+    }
+  ],
   "main": "./lib/mbtiles",
   "repository": {
     "type": "git",
@@ -24,12 +31,14 @@
     "sphericalmercator": "~1.0.1"
   },
   "devDependencies": {
-        "tape": "~3.0.0"
+    "tape": "~3.0.0",
+    "eslint": "~1.00.0",
+    "eslint-config-unstyled": "^1.1.0"
   },
   "engines": {
     "node": ">= 0.10.0"
   },
   "scripts": {
-        "test": "tape test/*.js"
+    "test": "eslint lib && tape test/*.js"
   }
 }