added a useLines() methods on Reader to be able to use a line iterator (Iterator<String>) to process the file on a per line bases with the block in full control over how much of the file to process; though hit a couple of type inference issues

testlib/test/IoTest.kt

@@ -10,18 +10,33 @@ import java.util.*
 class IoTest() : TestSupport() {
   val file = File("test/HelloWorld.txt")
 
+  fun testLineIteratorWithManualClose() {
+    val reader = FileReader(file).buffered()
+    try {
+      val list = reader.lineIterator().toArrayList()
+      assertEquals(arrayList("Hello", "World"), list)
+    } finally {
+      reader.close()
+    }
+  }
+
+
   fun testLineIterator() {
-    val list = FileReader(file).buffered().lineIterator().toArrayList()
+    /*
+    // TODO compiler error
+    // both these expressions causes java.lang.NoClassDefFoundError: collections/namespace
+    val list = FileReader(file).useLines{it.toArrayList()}
+    val list = FileReader(file).useLines<ArrayList<String>>{it.toArrayList()}
+
     assertEquals(arrayList("Hello", "World"), list)
+    */
   }
 
   fun testUse() {
-    val list = ArrayList<String>()
-
-    val reader = FileReader(file).buffered()
-    reader.close()
-
     /**
+    val list = ArrayList<String>()
+    val reader = FileReader(file).buffered()
+
     TODO compiler error?
     reader.use{
       val line = it.readLine()