Add npm script to run eslint

.gitignore

@@ -16,6 +16,7 @@ provision.sh
 *.komodoproject
 .DS_Store
 feeds/recent.rss
+.eslintcache
 
 logs/
 
@@ -51,4 +52,4 @@ tx.exe
 .transifexrc
 
 ##Coverage output
-coverage
+coverage

package.json

@@ -11,6 +11,7 @@
   "main": "app.js",
   "scripts": {
     "start": "node loader.js",
+    "lint": "eslint --cache .",
     "test": "./node_modules/.bin/istanbul cover ./node_modules/.bin/_mocha -- ./tests -t 10000"
   },
   "dependencies": {