Additional, optimized constructors & AddRange variants added to RecyclableArrayList. Benchmarks extended.

Recyclable.Collections/RecyclableDefaults.cs

@@ -3,7 +3,7 @@
 	public class RecyclableDefaults
 	{
 		public const int BlockSize = 10_240;
-		public const int Capacity = 8;
+		public const int Capacity = 1;
 		public const int MinPooledArrayLength = 100;
 	}
 }