Sprint fine-tuning and bug fixing

[Buhmann]

- The calculation of the startpositions of the riders has changed. That means fixing of bugs a hopefully more comprehensible.

- Little changes of the energy usage. Rider which are behind another rider, lose more energy than before. Of course it is still necessary to avoid beiing in the wind. But if the rider in front of yours starts sprinting, he will lose energy, too.

[Buhmann]

Again a little improvement of the finish sprint:
A new function "Make room and finish sprint" is available.
That means: The rider will not block anymore (own riders and opponents), but for him the finish ends and he will not be able to influence the sprint anymore.

Furthermore the impact of the flat value (for downhill and climbing the same) for the initial spritn position has changed: If the riders do not launch the sprint, the sprint value will be more important than before.

[Buhmann]

Another fix:

If you sprint ("sprint now") with a rider while keeping the setting for follow the rider in front of yours, the rider itself will decide what it is the best for him: If your rider is weaker he will follow instead of falling behind.