ActiveNick:Or to play it safe, make a minor change in the code, like renaming the project to TheZShipgame and then share your "mod" with everyone, including source. :)
Though the license says that you don't need to change anything in order to redistribute it...
"A “contribution” is the original software, or any additions or changes to the software."
"[...]each contributor grants you a non-exclusive, worldwide, royalty-free copyright license to reproduce its contribution, prepare derivative works of its contribution, and distribute its contribution or any derivative works that you create."