Patch Notes release 1.5f

This patch contains some nice optimizations and under-the-hood work, plus some good bug fixes. As always, let me know if you run into any troubles.

1.5f Patch Notes

• Changed the audio for event popups to remove the drum sound effect
  
• Changed diplomacy so that expansionism does not make the AI nearly as angry, except for Expansionist AIs who remain very angry
  
• Fiddled with the Events system to have some more flexibility and reliability. There were times where certain events would trigger unexpectedly or at the wrong time, and I want to iron all of that out
  
• The unique bonus buildings will now only spawn once per empire (hellforge, private shipyard, wormhole institute, Solar array, etc). This was causing a ton of late game spam.
  
• Updated the fleet icon / associated text to have a little animation
  
• Updated the default deployment breadth to support more ships in a line (and to prevent ships from spilling out across the whole battlefield during deployment)
  
• Made rendering optimizations to the strategy map to help it run faster in the late game
  
• Removed the AU distance readout from fleet icons. It’s basically useless. All that matters is ETA and fuel.
  
• Removed the “you unlocked a technology” song because it gets old after a few time
  
• Fixed a bug in the shipyard with the Upgrade Armor button. Should work as intended now.
  
• Fixed a bug where the AI would sometimes launch troops from a planet that the player was invading (and would steal the player’s troops in the process!)
  
• Fixed an issue with the time controls changing the speed of the entire game if used in the battle arena
  
• Fixed issue with firing leaders Vos and Wyatt making the game hang
  
• Removed final references to the old ground combat system...I think!