Fix inconsistencies

Use linked hash set for reproducibility when required
Split chain generation into three smaller methods
Fixed error when certain chains skip certain vertices, specifically after splitting a partition
Hide internal classes
Add conversion to external classes when returning data
Update the polygon viewer
Update chain intersections in parallel
Sort edges cleaner
Resolve some TODOs

src/main/java/com/aaaaahhhhhhh/bananapuncher714/mesh/Chain.java

@@ -0,0 +1,26 @@
+package com.aaaaahhhhhhh.bananapuncher714.mesh;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class Chain {
+    protected List< Point > points = new ArrayList< Point >();
+    protected List< Chain > intersections = new ArrayList< Chain >();
+    
+    public Point getStart() {
+        return points.get( 0 );
+    }
+    
+    public Point getEnd() {
+        return points.get( points.size() - 1 );
+    }
+    
+    public List< Point > getPoints() {
+        return Collections.unmodifiableList( points );
+    }
+    
+    public List< Chain > getIntersections() {
+        return Collections.unmodifiableList( intersections );
+    }
+}