Biplane Racer patch 1.1

Hey,

Important update that changes some systems.
-Collisions have less impact, happens less often
-Overall difficulty lowered (multiple tweaks and changes)
-Arbitrary speed modifier for GPs (options)
-Arrows throughout the GP races to indicate directions to go
-Zoom out/in (useful for 2 players – auto set to max zoom in 2 players, set to min zoom in 1 player) (this does not change the adventure zoom back/forward)

Cheers