Added concat method

Author: x7airworker

src/main/java/org/javawebstack/abstractdata/AbstractArray.java

@@ -359,4 +359,11 @@ public boolean equals(Object obj) {
 
         return true;
     }
+
+    public AbstractArray concat(AbstractArray array) {
+        for (AbstractElement element : array)
+            add(element);
+
+        return this;
+    }
 }