0.9.2b changelist

Hives will now always spawn 3 Drones on death
Player markers can now be placed at specific room entrances
Player markers can now be placed in unvisited rooms if all rooms on the path are revealed
Markers will now display a description when viewed from the level map
Player and enemy Bladder Mines will no longer instantly detonate their projectiles when triggered through proximity
Fixed Mega-Layer laying player mines
Fixed mine trap breakables being able to contain power pickups
Fixed trigger markers not working correctly for triggers with multiple events