big ol' memory, cpu usage, and shutdown handling update. main changes include:

* rather than have all jobs created hooked into the clock for offset updates, have the jobQueue stay hooked up and update any active jobs accordingly (killing a memory leak of a JobTiming objects - one per job)
* dont go totally insane during shutdown and log like mad (though the clientApp things still log like mad, since they don't know the router is going down)
* adjust memory buffer sizes based on real world values so we don't have to expand/contract a lot
* dont display things that are completely useless (who cares what the first 32 bytes of a public key are?)
* reduce temporary object creation
* use more efficient collections at times
* on shutdown, log some state information (ready/timed jobs, pending messages, etc)
* explicit GC every 10 jobs.  yeah, not efficient, but just for now we'll keep 'er in there
* only reread the router config file if it changes (duh)

router/java/src/net/i2p/data/i2np/TunnelMessage.java

@@ -89,7 +89,7 @@ public class TunnelMessage extends I2NPMessageImpl {
         if ( (_tunnelId == null) || (_data == null) || (_data.length <= 0) )
             throw new I2NPMessageException("Not enough data to write out");
         
-        ByteArrayOutputStream os = new ByteArrayOutputStream(32);
+        ByteArrayOutputStream os = new ByteArrayOutputStream(4096);
         try {
             _tunnelId.writeBytes(os);
             if (_log.shouldLog(Log.DEBUG))