Surfing System

[Zrocket]

I decided to create a new issue to discuss how to properly implement surfing. I created a modified version of the example map to test with. Furthermore, I've found that using 30 to 40 percent of the add.x and add.z velocity gets us somewhat close to the desired effects, but there are still some issues. I'll have to look further into how surfing works in the original source engine, and how others have simulated it.