Merge pull request #641 in ZP/z-push from feature/ZP-1192-expose-shared-folder-api-to-z-push-admin to develop

* commit '662e5b40':
  ZP-1192 Flags can be combined when adding a shared folder. Fixed unaccurate comment.
  ZP-1192 Remove a shared folder for a user with z-push-admin.
  ZP-1192 List more details on shared folders with z-push-admin.
  ZP-1192 Command to add a shared folders with z-push-admin.
  ZP-1192 List more details on shared folders with z-push-admin.