PledgeBank: Implement Dashboard screen

Elements:

• list of max 10 recent active pledges (deadline in future, regardless of other attributes), made of following columns:
  o Title: (literally: "(creator_name) will (creator_pledge_desc) but only if (signers_limit) (signer_description_text) will (signer_pledge_desc).")
  o Id (civicrm_pb_pledge.id)
  o Signers limit (civicrm_pb_pledge.signers_limit)
  o Deadline (civicrm_pb_pledge.deadline)
  o Creator (display_name for civicrm_pb_pledge.creator_id)
  o Status: (successful|failed - as described in Pledge status chapter)
  o Active? (civicrm_pb_pledge.is_active)
• list of max 10 recent pledge signers
  o Name: (display_name for civicrm_pb_signer.signer_id), linked to contact record
  o Pledge: (literally: "...will (civicrm_pb_pledge.signer_pledge_desc)"), linked to pledge view page
  o Signed on: (civicrm_pb_signer.signing_date)
  o Anonymous? (civicrm_pb_signer.is_anonymous)
  o Done? (civicrm_pb_signer.is_done)