My suggestion is to put a single line copyright with the year in every file, like // (c) 2016 txutxu and a license inside the project. The default copyright l

My suggestion is to put a single line copyright with the year in every file, like // (c) 2016 txutxu and a license inside the project. The default copyright license protects you from unwanted copies. But when it comes to IP rights, a lot of practices are actually voodoo legalities: people do them out of habit and paranoia, not because it has ever been useful in court.