Update distribution script to build the archive first.
Update distribution script to build the archive first.

Also, add an extra confirmation prompt before publishing to npm.

nicksay/spfjs,youtube/spfjs,scrapp-uk/spfjs,nicksay/spfjs,tchiotludo/spfjs,theanh/spfjs,nicksay/spfjs,youtube/spfjs,tchiotludo/spfjs,theanh/spfjs,nicksay/spfjs,youtube/spfjs,tchiotludo/spfjs,scrapp-uk/spfjs,nicksay/spfjs,scrapp-uk/spfjs,scrapp-uk/spfjs,theanh/spfjs,youtube/spfjs,youtube/spfjs,tchiotludo/spfjs,scrapp-uk/spfjs,theanh/spfjs,theanh/spfjs,tchiotludo/spfjs