save npm original package maintainers to npm_module_maintainer table. 

fixed #464

from 1.5.x upgrade to 1.6.x, execute [v1.6.x-upgrade.sql](https://github.com/cnpm/cnpmjs.org/blob/26efecd2fc3b541088f2720beccec6d31b0e7878/docs/update_sqls/v1.6.x-upgrade.sql) first.
在没有同步完整之前只能使用author
2014-10-9 上午12:52于 "dead_horse" <notifications@github.com>写道：

> In controllers/registry/user_package.js:
>
> > @@ -38,5 +51,20 @@ exports.list = function* () {
> >        data[row.user] = [row.name];
> >      }
> >    }
> > +
> > +  if (firstUserModuleNames.length > 0) {
> > +    if (!data[firstUser]) {
> > +      data[firstUser] = firstUserModuleNames;
> > +    } else {
> > +      var items = data[firstUser];
>
> npm 上应该是没有区分 author 和 maintainer 的吧，这里是只取了 author 的？
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/cnpm/cnpmjs.org/pull/466/files#r18595890>.
>