added credits page for all contributors
added credits page for all contributors

zippyzsquirrel/squirrel-u,mjeannet/squirrel-u,zippyzsquirrel/squirrel-u,mjeannet/squirrel-u,zippyzsquirrel/squirrel-u,mjeannet/squirrel-u,mjeannet/squirrel-u,zippyzsquirrel/squirrel-u