Added Conway4, a Moore Neighborhood Conway.

src/rules/Conway4.java

@@ -0,0 +1,33 @@
+package edu.stuy.goldfish.rules;
+
+import edu.stuy.goldfish.Grid;
+import edu.stuy.goldfish.Patch;
+
+// An implementation of conway using Moore Neighborhoods.
+public class Conway4 extends RuleSet {
+    public static int states = 2;
+
+    public static Grid run (Grid g) {
+        Grid newGrid = new Grid(g.getWidth(), g.getHeight());
+        for (int i = 0; i < g.getWidth(); i++) {
+            for (int j = 0; j < g.getHeight(); j++) {
+                Patch[] neighbors = g.getPatch(i, j).get4Neighbors();
+                int numAlive = 0;
+                for (Patch p : neighbors)
+                    if (p.getState() == 1) numAlive++;
+                Patch p = g.getPatch(i,j).clone();
+                if (numAlive < 2) {
+                    p.setState(0); //Dies by underpopulation
+                }
+                if (numAlive > 3) {
+                    p.setState(0); //Dies by overpopulation
+                }
+                if (numAlive == 3)
+                    p.setState(1); //Born with 3 neighbors.
+                newGrid.setPatch(i,j,p);
+            }
+        }
+        return newGrid;
+    }
+
+}