Router: Add startup/shutdown state machine

Tunnels: Cleanup, catch more cases of zero-hop configuration
ClientAppConfig: Start i2ptunnel sooner
  Since BuildRequestor won't use a zero-hop exploratory as a paired tunnel
  for client builds, it's now safe to start client tunnels
  before the expl. tunnels are ready. This will save up to 90 seconds.

installer/resources/clients.config

@@ -39,6 +39,7 @@ clientApp.1.startOnLoad=false
 clientApp.2.main=net.i2p.i2ptunnel.TunnelControllerGroup
 clientApp.2.name=Application tunnels
 clientApp.2.args=i2ptunnel.config
+clientApp.2.delay=35
 clientApp.2.startOnLoad=true
 
 # run our own eepsite with a seperate jetty instance