Make serializable and implement getWellOccupancies method

src/main/java/SequenceRecord.java

@@ -5,9 +5,10 @@ Ideally, I'll be able to construct both the Vertices and the weights matrix from
 
  */
 
+import java.io.Serializable;
 import java.util.*;
 
-public class SequenceRecord {
+public class SequenceRecord implements Serializable {
     private final String sequence;
     private final SequenceType type;
     //keys are well numbers, values are read count in that well
@@ -42,6 +43,8 @@ public class SequenceRecord {
         return wells.keySet();
     }
 
+    public Map<Integer, Integer> getWellOccupancies() { return wells;}
+
     public boolean isInWell(Integer wellNumber) {
         return wells.containsKey(wellNumber);
     }