Balance fixes

[Buhmann]

A few small balance fixes which are already online for short races for weeks are now also online for the competition races:

1. New sprint balance: Rider which are not sprinting won´t be better at the end than riders, who start their sprint early. So the balance changed here a little bit.

2. Hills/mountains with pavé will be more selectable. Furthermore the time difference is changed a little bit. It is more a bug fix than a balance change: For example weak riders with 0 energy will not be anymore better than other riders on hard kilometres.