Search for shaders in BSP if none were found in MOD Fixed logic_collision_pair not calling base UpdateOnRemove (and a few other entities as well) Added "shaders/*.vcs" to BSP whitelist Empty Entity.Constraints table on constraint removal Fixes for `tanktrain_ai` * Fixed sound playback and updated default sounds to existing files * Added "Chase Target" key value * Added missing input to the FGD * Fixed movement * !player target will update to the closest player before every move * Change update rate while moving to 0.1s (from 0.5)