Add method to get read count from individual wells

src/main/java/Vertex.java

@@ -32,6 +32,8 @@ public class Vertex implements Serializable, Comparable<Vertex> {
 
     public Integer getReadCount() { return record.getReadCount(); }
 
+    public Integer getReadCount(Integer well) { return.record.getReadCount(well); }
+
     public Map<Integer, Integer> getWellOccupancies() { return record.getWellOccupancies(); }
 
     @Override //adapted from JGraphT example code