Cascading style sheets reference

[hydroper]

This tries to cover more the CSS language per se, but it may include few things from ActionScript 3.

I might add meta-data specific to ActionScript 3 as well.

[joshtynjala]

Some of the content in this PR appears to be copied from the Using Adobe Flex documentation, which is licensed CC BY-NC-SA 3.0.

https://web.archive.org/web/20160322180947/http://help.adobe.com/en_US/flex/using/WS2db454920e96a9e51e63e3d11c0bf62883-7ff2.html

According to ASF 3rd Party License Policy, we (unfortunately) may not be able to include documentation derived from a CC NC license:

You may NOT include the following licenses within Apache products:
Creative Commons Non-Commercial variants

Unless a fellow contributor in Flex/Royale knows that Adobe donated "Using Flex" to the ASF with Apache 2.0 or another compatible license?

[hydroper]

@joshtynjala Right, all I could do is mention that the document takes explanations from there and a few from another blog.

[hydroper]

So, browsing the link you mentioned, I've found out that there isn't just a "Using Flex" PDF, but also a browsable HTML form...

[joshtynjala]

Unfortunately, a disclaimer that some of the content is from Using Flex and another source is not sufficient. The document must be written in your own words.

[hydroper]

OK, I'm not sure whether I'll do this, so I'm closing it for now :-|