Put generated Lua scripts under Unlicense

[alexgleason]

First off, I am not a lawyer.

I noticed that the generated Lua scripts (the ones in initial_quest) did not have a license. This makes it confusing how people are allowed to use them. For example, since the Quest Editor itself is GPL, it seems like any quest where you use "File > New Quest..." as a starting point is affected by copyleft and must also be GPL.

My impression is that the Solarus Team wants people to be able to license their own quest however they want, while only the Quest Editor and Engine are GPL.

That being the case, I think the initial boilerplate scripts should come with a copyright waiver. I've added a comment block to the top of each script with a copy of Unlicense. Something like CC0 might also work.

(I'm also happy to use the GPL here instead. If so, I think it should just say so at the top of the scripts like I've done here.)

I know it's a bit ugly to put a license at the top of every file, but I think it will really benefit the Solarus community. See The source code is the license.

What are the license terms? For much open source software, there is a simple answer: A single license text contains all the license information for the entire body of software. But the power of open source is that it facilitates other developers building upon that starting point, and that process can complicate license information.

If I'm going on the Solarus forum and pulling code from many different people, I don't want to manage a giant license.txt containing every detail. I'd rather put it at the top of each affected file.