I am contributing to a library that is licensed under the MIT license.
In the license and in each class file it has a comment at the top saying:
Copyright (c) 2011 Joe Bloggs <firstname.lastname@example.org>
I assume that he owns the copyright to the file, and can change the license of that file as he sees fit.
If I contribute to the library with a new class entirely write by me, can I claim copyright of that file. And put:
Copyright (c) 2011 Petah Piper <email@example.com>
at the top?