This package has been marked as private

npm publish                                                                                                                               [13:17:43]
npm ERR! Darwin 14.3.0
npm ERR! argv "/usr/local/bin/iojs" "/usr/local/bin/npm" "publish"
npm ERR! node v1.7.1
npm ERR! npm  v2.8.4

npm ERR! This package has been marked as private
npm ERR! Remove the 'private' field from the package.json to publish it.
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR!     <https://github.com/npm/npm/issues>

删除 package.json文件的 "private": true,