Feature
- Implemented a Player Presence Radius system : allowing spawner to only run when a player is within a defined radius, also has an option to make spawners entities to disappear when no player is within the range

API
- Run hook vkx_entspawner:should_spawner_run before running a spawner, used by PPR, to prevent spawner from running
- Spawner's Locations are now stored in spawner.locations in the Client (same way than the Server) instead of being stored in the spawner table numerically
- Added vkx_entspawner.get_spawner_center( spawner ) returning a average position of all his locations
- Added vkx_entspawner.get_tool() clientside to retrieve the tool object
- Added radius and radius_disappear variables on spawner tables

- Added keyframe_rope to blocking entities blacklist (a.k.a. fixing spawning in RP Asheville)

- Fix entities not spawning in some maps caused by entity obstruction
- Added notifications when an entity can't be placed or when you didn't select entities
- Added basic debug system with convar 'vkx_entspawner_debug'

- Fix conflicts with the clean-up workaround