Started Rewriting LinkData

Created NewLinkData and replaced references to the original LinkData.
Moved it to the mod_pocketDim.core package. Added Point4D, an immutable
point type for 3D integer coordinates with an added dimension ID.

StevenDimDoors/mod_pocketDim/core/NewLinkData.java

@@ -0,0 +1,36 @@
+package StevenDimDoors.mod_pocketDim.core;
+
+import java.io.Serializable;
+
+import StevenDimDoors.mod_pocketDim.util.Point4D;
+
+public class NewLinkData implements Serializable
+{
+	private static final long serialVersionUID = 1462177151401498444L;
+	
+	private Point4D source;
+	private Point4D destination;
+
+	public NewLinkData(int srcX, int srcY, int srcZ, int srcDimension)
+	{
+		source = new Point4D(srcX, srcY, srcZ, srcDimension);
+		destination = null;
+	}
+
+	public NewLinkData(int srcX, int srcY, int srcZ, int srcDimension, int dstX, int dstY, int dstZ, int dstDimension)
+	{
+		source = new Point4D(srcX, srcY, srcZ, srcDimension);
+		destination = new Point4D(dstX, dstY, dstZ, dstDimension);
+	}
+	
+	public NewLinkData(Point4D source, Point 4D destination)
+	{
+		
+	}
+
+	@Override
+	public String toString()
+	{
+		return source + " -> " + destination;
+	}
+}