Added atom-package-deps and require + install in activate

Author: gforge

lib/main.coffee

@@ -7,6 +7,7 @@ module.exports =
       default: 'luac'
       description: 'The executable path to luac or luajit.'
   activate: ->
+    require('atom-package-deps').install('linter-lua');
     @subscriptions = new CompositeDisposable
     @subscriptions.add atom.config.observe 'linter-lua.executablePath', (executablePath) =>
       @executablePath = executablePath

package.json

@@ -9,7 +9,8 @@
   },
   "license": "MIT",
   "dependencies": {
-    "atom-linter": "^4.6.1"
+    "atom-linter": "^4.6.1",
+    "atom-package-deps": "^4.0.1"
   },
   "package-deps": [
     "linter"