Performance Calculator v.2.6.2

2.6.2 makes a few big changes. I've added S2F Gain to the arrival altitude chart. It shows how much higher you would arrive if you flew at the proper Speed-To-Fly. The Time chart also shows times for S2F. The Polar curve graph now no longer allows the S2F indicator dot to exceed the 100% speed-bar value. That applies to the S2F table as well. The Polar Curves Table and Input tables have been changed to allow for different weights for each glider. That will allow two pilots to compare two different gliders, rather than one pilot looking at what their performance would be on each of the 4 gliders.