NEW Bugfixes + pre wind spins from grinds

CHANGES:

• added: pre wind spins from grinding

• added: squat animation for jumping from a grind

• added: controller detection system (start menu)

• fixed: jumps are no longer speeding up during replay

• fixed: camera jittering during replay while using the standard follow cam (in idle state)

• fixed: infinite wallrides

• fixed: rolling on ceilings/walls

• fixed: bug where avatar was occasionally doing a landing sequence immediately after switching from idle to striding

• tweaked: impact of locking angle on grindspeed