update developer commentary

for weapon traits, crates and palettes
clarify that you don't need to update the wiki page manually

OpenRA.Mods.RA/Attack/AttackBase.cs

@@ -21,7 +21,9 @@ namespace OpenRA.Mods.RA
 	{
 		public readonly bool CanAttackGround = true;
 
+		[Desc("Ticks to wait until next AutoTarget: attempt.")]
 		public readonly int MinimumScanTimeInterval = 30;
+		[Desc("Ticks to wait until next AutoTarget: attempt.")]
 		public readonly int MaximumScanTimeInterval = 60;
 
 		public abstract object Create(ActorInitializer init);

OpenRA.Mods.RA/Attack/AttackFrontal.cs

@@ -9,10 +9,12 @@
 #endregion
 
 using System;
+using OpenRA.FileFormats;
 using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA
 {
+	[Desc("Unit got to face the target")]
 	public class AttackFrontalInfo : AttackBaseInfo
 	{
 		public readonly int FacingTolerance = 1;

OpenRA.Mods.RA/Attack/AttackMedic.cs

@@ -14,7 +14,7 @@ using OpenRA.FileFormats;
 
 namespace OpenRA.Mods.RA
 {
-	[Desc("Give the unit a \"heal-weapon\".",
+	[Desc("Give the unit a \"heal-weapon\" that attacks friendly targets if they are damaged.",
 		"It conflicts with any other weapon or Attack*: trait because it will hurt friendlies during the",
 		"heal process then. It also won't work with buildings (use RepairsUnits: for them)")]
 	public class AttackMedicInfo : AttackFrontalInfo