Fence Player Upper

This update overhauls the fence detection system one more time, resulting in better uppering and with less checks than before!

Changelog:
Switched the fence detection system with one based on the player's yaw and math, only checking what's necessary
Fixed obstacles not halting the fence detection system
Fixed non-air small blocks above fences stopping the fence checks
The Jump Boost potion effect now disables the fence checks
Reorganized the internal code