Add plate well concentrations to output data

src/main/java/Plate.java

@@ -31,7 +31,9 @@ public class Plate {
 
         List<Integer> concentrations = new ArrayList<>();
         for (List<Integer[]> w: wells) {
-            concentrations.add(w.size());
+            if(!concentrations.contains(w.size())){
+                concentrations.add(w.size());
+            }
         }
         this.concentrations = new Integer[concentrations.size()];
         for (int i = 0; i < this.concentrations.length; i++) {