Updates the script to get it to working state again.

The script stopped working because I updated `ifttt-webhook` to use [the description tag](https://github.com/captn3m0/ifttt-webhook/issues/2) instead of the "tag" field to carry the URL for the final webhook.

It is still giving some issues, because of readability:

- Readability's mobilizer sometimes gives out 302 redirects when it cannot process the content.
- Readability css is no longer served via `/media/css/mobile/mobile.css` but via cloudfront, so the css replace trick doesn't work anymore

But since these are script specific changes, I've avoided working on them, just working on the core messaging functionality of the script.

Hope this gives you a base to build your script on.