Node.js code removal

We made and used an [npm module](https://www.npmjs.org/package/tal) to handle the server side logic of TAL.

It makes it easier to understand what is related to the UI, and what is related to the server side logic of the framework.

So I propose to (re)move the Node.js related code of this repository and to officially maintain it in 
I am totally okay to transfer bbcrd/node-tal to the fmtvp org though :-)

This way, we could distribute the entire TAL framework over npm:
- `tal` contains the Node.js code/HTTP middlewares
- `tal-components` contains the TV components
- `tal-config` contains the public device configurations

An updated version of the `talexample` app can be consequently found in fmtvp/talexample#12