Don't know if anyone is still monitoring this, but I can clarify something about the license: Heyu's source code predates the GPL by several years, and the original author (and copyright holder) of the code dropped out of sight in 1986. Thus the project _cannot_ relicense itself unless someone tracks him down, or, if he is no longer living, whoever inherited his copyrights.
It is a highly uncommon situation, but the project is aware of the license compatibility issues. They are just trying to respect the original author's wishes.
Don't know if anyone is still monitoring this, but I can clarify something about the license: Heyu's source code predates the GPL by several years, and the original author (and copyright holder) of the code dropped out of sight in 1986. Thus the project _cannot_ relicense itself unless someone tracks him down, or, if he is no longer living, whoever inherited his copyrights.
It is a highly uncommon situation, but the project is aware of the license compatibility issues. They are just trying to respect the original author's wishes.