clutch mod proposal

[joevenzon]

I checked in a change to the CS for the 15000 value you suggested. Seemed to work fine for me. I rewrote the way the clutch works recently on the recommendation of some forum folks (before, the clutch wasn't actually simulated if it was engaged, which led to all kinds of weird problems), and indeed that exposed some errors in the car setups that didn't get noticed before. I fixed some of them but it looks like I missed the CS. To be honest, enough of the physics engine has changed or had bug fixes that all of the car settings probably need a going over. The most recent in-depth tunes were to the C7 and F1-02, both of which are a blast to drive!