AI Update

- ADJUSTED: Several changes have been made to improve the ai's understanding of space, when to freeze, its ability to locate the player and a mechanism for each AI to seek out a random player every 60 seconds
- ADJUSTED: The player sense frustum has been adjusted to a more limited viewing angle that closely matches the player camera
- ADJUSTED: The scroll to switch equipment is now able to switch equipment even when melee weapon is out
- FIXED: Bug where there was no walk animation while holding a melee weapon
- FIXED: Bug where the pyramid level sfx wasn't looping
- FIXED: Bug where some decals from various gates were showing in the wrong level