User changes

[colindean]

• Drop these fields
  • date_arrival - too event-specific
  • date_departure - too event-specific
  • gamer_type - too event-specific
  • full_name - redundant
• Clarify in signups and UserController#show these fields
  • name - should be your real, full name
  • handle - should be your handle, nickname, gamertag, whatever people call you other than your real name
  • pronunciation - should be an easy to read, phonetic spelling of how the handle should be pronounced.