"qx add script" to accept URL

[cboulanger]

This would download a third-party script from an URL and add it to the qooxdoo app in one step. Of course this is potentially dangerous, but what isn't ? We will happily allow people to shoot themselves in the foot in various ways. :-)

[oetiker]

there was already a proposal to integrate npm based stuff ... that seems more powerful!

https://github.com/qooxdoo/qooxdoo-compiler/issues/74

[cboulanger]

We don't need an option, we can just let the script path be an URL. Maybe already possible, need to check.