Add things the frontend needs

[gcampo88]

• [X] allow PUT requests
• [x] add updatedAt to campaign API show response
• [x] add fields to campaigns:
  • originalCopy vs. editedCopy
  • notes
  • mustSay
  • dueDate
  • approved (only if sponsor requires approval)
• [x] update the google app script to add a campaign to reflect new fields

[gcampo88]

back to you sir @cavis