added unfinished draft for a reduction variable abstraction

src/main/java/teetime/stage/Counter.java

@@ -24,4 +24,23 @@ public class Counter<T> extends AbstractConsumerStage<T> {
 	public OutputPort<T> getOutputPort() {
 		return this.outputPort;
 	}
+
+	public static final class ThreadLocalCounter {
+		private final ThreadLocal<Integer> counter = new ThreadLocal<Integer>();
+
+		public Integer inc() {
+			Integer value = counter.get();
+			Integer newValue = value + 1;
+			counter.set(newValue);
+			return newValue;
+		}
+
+		public Integer inc(final Integer rightHandValue) {
+			Integer value = counter.get();
+			Integer newValue = value + rightHandValue;
+			counter.set(newValue);
+			return newValue;
+		}
+	}
+
 }

wiki @ 0e447457

-Subproject commit a93581905ef7b0584d52eae1898148ffa6201a31
+Subproject commit 0e4474577e1f49bc96e734c286b2d9e0363895e8