Beta Backyard Kart 0.17.6

I didn't have as much time as I hoped this weekend to work on this, but what I did do is stable. I am not sure if any of the changes I made will result in texture issues, but if it does, try clearing out the "0.25/temp/vehicles/bigkart" folder then message me if that does not work. The below is a list of changes:

• The dummy helmet is now removable
• Adjusted durability of various parts
  • The frame is no longer indestructible
  • The front wheels are now more likely to break off instead of folding in on themselves.
• The country name has been changed to align with Vanilla standards
• Adding drag to the floor
  • It didn't make sense that a huge flat sheet of metal would not affect aero
  • On any variant that is tilted forward, there will be a slight downforce effect, and wheelies at speed may cause you to flip over backward
• Changed exhaust sounds
  • This has a huge effect on the sound of the engines, which means I may not have to make the 4 cylinder sounds.
• Some more tweaks to the bubble tires
  • A good portion of the instability came from the front tires, surprisingly
• Adjusted values in the diffs as some did not have standardized ratios
• Changed the texture file format from png to dds.
  • This reduced the file size significantly
• Changed the crawler config around a bit
• Adjusted exhaust particle placement after finally getting the exhaust tree right