+ Added "Previous Awards" section to landing page

* Gives a feeling of posterity to the group, and becomes something the
  recipients can reference.
Changed link for current RfP

* The link with 'current_rfp.doc' "expresses" what the document is
  better. The intention is that each year, this file will be overwritten
  with the new RfP, and a copy of it will be stored in the
  'rfp_archive'...named with the year, etc.