Add "Raid" feature

[Frechetta]

Add the concept of a Raid

• track raid membership (officers only)
  • snapshots when roster changes
  • officers sync data
  • delete events after 24 hours
• record raid events (on-time, started, boss killed, ended)
• record attendance and EP awards
• record overall raid historical info (raid time, attendance, EP awards)
  • this could just piggy back onto history: associate history events with a raid
• raid is created manually or when asked when entering an instance (only when a raid has not been started)
• set a start time or manually start
  • if manually started, can set a retroactive start time
• automatic on-time award
  • defined time delta for on-time members
• automatic attendance award
  • applies to all players in the raid between start/end time that were there for a boss kill)
• automatic end-of-raid award
  • applies to all players present at raid end time
• built-in bench
  • persistent, but raid start verifies bench first
  • bench also listed on raid window
• when entering an instance and useForRaid is set, ask if you'd like to continue using addon
• don't add raiders that aren't guildies to roster until they gain EP/GP

raid = {
    rosterHistory = [],
}