Make pioneer vernier physicsless (#259)

Since the pioneer vernier is extremely small (less than 1 kg) and apparently has a weird CoM placement, just make it physicless

Author: Capkirk123

GameData/ROEngines/PartConfigs/PioneerVernier.cfg

@@ -61,6 +61,7 @@ PART
 	crashTolerance = 10
 	breakingForce = 10000
 	breakingTorque = 10000
+	PhysicsSignificance = 1	//since this is below 1 kg, and apparently has a buggy CoM anyway, just make it physicsless
 	stagingIcon = SOLID_BOOSTER
 
 	skinTempTag = Steel