* Two new fields on the new project page that ask the project leader to
  specify how many ron and pcplab nodes they need. There is a link to a
  page that should describe these nodes, but thats blank.

* The project approval page will add a couple of checkboxes for ron and
  pcplab nodes. This will allow the project to be approved independent of
  the ron/pcplab usage. So, you can approve the project but decline the
  request to use those nodes types (or just one of them).

* The project table in the DB has a "list" of remote node types for which
  accounts should be built. Its implemented as a set and it can contain
  just two node types (pcron, pcplab) right now. The set is created in
  the approval page, and someday we can add a page to operate on that
  set directly if we need it.