Modern Advancements Screen

• Added HTTP API for servers
  • Lets you access advancements, players, stats and a feed
  • See description for detailed explanations
• Added Activity Feed and Leaderboards
• Fixed a non-issue with completed requirements not progressing in the Tracking HUD
• Improve the Tracking HUD display on requirements
• Moved Tracking HUD render layer + fixed a scissor leak that prevented other HUD elements from rendering

A lot of this is work in progress and will be changed/improved. Right now it's rough layout to test for any issues I've missed