Update to version 0.3.100

Hello marble fans! Here is what has changed in 0.3.100:

• Fixed wall collisions, no more weird behavior
• Fixed directions, for both ground and bridges the directions are now properly placed along the move of the mouse
• New ranking view, added diff times and finish status
  
• Ranking positions are updated when balls pass checkpoints
  
• Finish button moved to top panel
• Finishing race doesn't close ranking view, marks balls as 'Did not finish'
  
• Race buttons are present all the time to show race setup progress

• Fixed balls colliding with obstacles

Enjoy!