Global Event Update

[ashoulson]

• Remove unreliable global events
• Add C2S reliable global events and refactor to common peer code
• When packing a server packet:
  • Pack a minimum number of reliable events
  • Fill with entities
  • Fill with remaining reliable events if possible
• When packing a client packet:
  • Pack commands (fixed number)
  • Pack a minimum number of reliable events
  • Fill with view updates
  • Fill with remaining reliable events if possible