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)

apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnelRunner.java

@@ -121,6 +121,8 @@ public class I2PTunnelRunner extends I2PThread {
         } catch (IOException ex) {
             ex.printStackTrace();
             _log.debug("Error forwarding", ex);
+        } catch (Exception e) {
+            _log.error("Internal error", e);
         } finally {
             try {
                 if (s != null) s.close();