Update Notes for v0.98

[list] [*] Activated the Campaign Editor: It is now possible to create and share your own single-player campaigns [*] Campaign Selector: It is now possible to subscribe to campaigns made by other players [*] AI players are now supported in online games (with adjustable latency, balancing between smoothness and reaction times) [*] Dedicated server admins can upload their AI groups and lines (subscribed ones and the ones belonging to a share group) at session init [*] Added option Force AI Supported Levels to hosts - changes the level is there are not enough players and the next level does not support AI [*] Added automatic vehicle changing rules to hosts - changes the vehicle automatically based on the next level's level list (tags) [*] It is now possible to make the experimental physics settings not affect the AI controlled vehicles [*] Level Editor: Added new terrain textures [*] Level Editor: Curb, Kart barrier and flat building colors can now be changed [*] Level Editor: Added new house models (with changeable styles, check the Level Colors window) [*] Customizer: The previously selected paint texture is now initially shown and selected in the texture picker window [*] Campaigns: Event result tooltip now shows requirements for all levels [*] Sumo: It is now possible to make the last contacts in a sumo level never expire (a setting in the level properties) [*] Leaderboards: Left-clicking Play against ghost button now keeps the multi-selected ones, too [*] Damage Settings: If Health After Respawning is below 100%, there is an extra option Respawn Never Decreases Health [*] Capture Battle: Wrecked players no longer can capture a flag (fixed losing and recapturing it in a loop) [*] Steam SDK version updated - Linux server admins may need to run .steam/steamcmd/steamcmd.sh once if steamclient.so is not updated [*] Miscellaneous other minor fixes and improvements [/list]