-Fixed accidental regression of guard shotgun anim

-Added dynamic interactions between Marines and Vortigaunts/Alien Grunts

-Replaced a gesture in Clifford's scene with a matching Barney gesture

-Fixed guard walking/running + aiming pistol animations for real this time
-Attempted to fix guard pistol reloads not completing if interrupted
-Added back missing guard dynamic interactions (yes, again)
-Fixed Office Complex guard being instantly killed by the zombie during his intro scene

-Fully implemented male shared gestures into the Marine animation model (BMCE is no longer required to see these in action!)
-Reworked scripted marine choreography across the game with more gestures and full body animation
-Re-added missing guard walking/running + aiming pistol animations
-Slightly reworked guard shotgun animations
-Shotgun pump is now audible when a guard fires a shotgun

-Re-implemented guard vs. zombie dynamic interactions that I accidentally removed

-Added improvements for Motherlode scene in Surface Tension

-Added a unique animation for the OAR guard's scripted death

-Updated security guard attention idle

-Fixed missing sit_chair, sit_ground, and wave animations
-Included updated guard anims from BM:BS for real this time
-Re-implemented compatibility fix for Guard SMG Reload Fix