RES twitter expandos

The Firefox version of Reddit Enhancement Suite intentionally disables Twitter's formatting code due to the addons.mozilla.org rules forbidding third-party script loading. Twitter normally sets up its formatting by injecting a script right next to the tweet, which then removes the unformatted version and replaces it with a formatted one.

I have only tested this on Firefox, as it is only necessary on Firefox. RES must be installed for this script to work.