add union(IntList,IntList) and addAll(IntList)

IntPredicate gets the current value and the index.
This was handy while removing duplicate values.

primitiveCollections/src/main/java/org/lucares/collections/IntPredicate.java

@@ -11,11 +11,13 @@ public interface IntPredicate {
 	/**
 	 * Evaluates the predicate.
 	 *
-	 * @param i
-	 *            the input argument
+	 * @param value
+	 *            the value
+	 * @param index
+	 *            the index in the list
 	 * @return {@code true} iff the input argument matches the predicate
 	 */
-	boolean test(int i);
+	boolean test(int value, int index);
 
 	/**
 	 * Returns a predicate that represents the logical AND of {@code this} and
@@ -28,7 +30,7 @@ public interface IntPredicate {
 	 *             if {@code other} is null
 	 */
 	default IntPredicate and(final IntPredicate other) {
-		return (t) -> test(t) && other.test(t);
+		return (value, index) -> test(value, index) && other.test(value, index);
 	}
 
 	/**
@@ -42,7 +44,7 @@ public interface IntPredicate {
 	 *             if {@code other} is null
 	 */
 	default IntPredicate or(final IntPredicate other) {
-		return (t) -> test(t) || other.test(t);
+		return (value, index) -> test(value, index) || other.test(value, index);
 	}
 
 	/**
@@ -51,6 +53,6 @@ public interface IntPredicate {
 	 * @return the negation of {@code this}
 	 */
 	default IntPredicate negate() {
-		return (t) -> !test(t);
+		return (value, index) -> !test(value, index);
 	}
 }