I have included this in my rails: 

```
gem 'jquery-datatables-rails', github: 'rweng/jquery-datatables-rails'

```

but when I start the server I'm getting this error :

```
←[31mYou passed :github as an option for gem 'jquery-datatables-rails', but it is invalid.←[0m

```

I guess its because I'm running it locally.BTW,what will be my path if I'm running it locally?

1 more thing I followed this cast: 

<http://railscasts.com/episodes/340-datatables?view=asciicast> 

I have also tried simply this: 

```
gem 'jquery-datatables-rails'

```

But after bundle install the css and js files are not downloaded and it is giving me file not found error.