Streaming: Westwood+ congestion control (ticket #2719)

Increase max slow start window to 64
Change RTT calculations from double to float
Original idea from jogger
Original patch from zlatinb
Developed and tested with zlatinb

router/java/src/net/i2p/router/RouterVersion.java

@@ -18,7 +18,7 @@ public class RouterVersion {
     /** deprecated */
     public final static String ID = "Monotone";
     public final static String VERSION = CoreVersion.VERSION;
-    public final static long BUILD = 13;
+    public final static long BUILD = 14;
 
     /** for example "-test" */
     public final static String EXTRA = "";