v2.0.2b11 -> v2.0.2b13

== Removed elements ==


== Added elements ==


== Changed elements ==
Meta_version
v2.0.2b11 (line=19): 39;
v2.0.2b13 (line=19): 40;

Option_AirFriction_Description
v2.0.2b11 (line=517): "The air friction in Algodoo depends on the velocity v of an object as well as its diameter D across the direction of movement.";
v2.0.2b13 (line=517): "The air friction in Algodoo depends on the velocity v relative to the wind, as well as the object diameter D across the direction of movement.";