Indicate that `meteor build` can produce a directory as well.
Indicate that `meteor build` can produce a directory as well.

It should be made clear that in lieu of a tarball, the `--directory` argument can be passed to `meteor build` to produce a `bundle` directory.

Related to meteor/meteor #7587
Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor