Update to version 60 (experience for single game)

Changes:

• added experience points for solo games!
• changed tyre friction (cars have better grip)
• added one spawnable haystack in Osmicka map (cut all grass on middle roofs)
• added easter egg in Osmicka map (hint: sunflower)
• added experimental controller support
• fixed wheel upgrade for Cutter
• fixed middle collision in Column map (you could fall inside sometime)
• rearranged maps in host menu
• removed uncollectable haystacks from Osmicka map
• tested and aligned all playerstarts in Sky Blocks map (sometimes caused bugs)