Licensing chapter resources

[billspat]

the main goal of this chapter is to say that that one needs to check a codebase license before blindly using it or taking parts of it. Some license don't allow for that.

Resources describing licenses and how to choose one:

• "A dev’s guide to open source software licensing" by Gina Häußge, github.com https://github.com/readme/guides/open-source-licensing
• Chapter on licensing from the Software Carpentry git workshop: https://swcarpentry.github.io/git-novice/11-licensing.html