Minor update

- Added simple Pair object due to lack of javafx support

src/com/tofvesson/async/WorkerThread.java

@@ -1,6 +1,6 @@
 package com.tofvesson.async;
 
-import javafx.util.Pair;
+import com.tofvesson.collections.Pair;
 
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;

src/com/tofvesson/collections/Pair.java

@@ -0,0 +1,16 @@
+package com.tofvesson.collections;
+
+public class Pair<K, V> {
+
+    private final K k;
+    private V v;
+
+    public Pair(K k, V v){
+        this.k = k;
+        this.v = v;
+    }
+
+    public K getKey(){ return k; }
+    public V getValue(){ return v; }
+    public void setValue(V v){ this.v = v; }
+}