godeps: fix import paths
pkg: add package download command
package: add 'package create bulk' command

Allows user to take output of `package download`
command and create packages from the directory's
`*info.json` files.
package: refactor create bulk to use goroutines
package: add final log message to create bulk cmd
Merge pull request #75 from colegleason/pkg-download

package: add command to download public packages