Adding https:// to the src if the users loads the script from the local storage

This plugin injects the Facebook script with
`var src     = '//connect.facebook.net/'.concat(settings.locale, '/all.js'),`

It'd be useful if it verifies if the user is accessing locally (by the file:/ protocol).

I'm developing a Cordova / PhoneGap hybrid app and should this plugin, but as it is the facebook extension fails to load and by the iOS development guidelines I should load my logic locally, so I can't just use a remote page to solve this (and make the app update without the App Store and so on).