+ remove peers who do not meet the minimum score

* minor bug fixes and documentation improvements
* do not cleanup peers if we have no online peers (probably not
connected anyway)
* do not run peer cleanup until a min
* do not spam block list on shutdown during block sync
* use correct thread decrement in peerCleanup
* added trust int to address table, not used yet

onionr/static-data/default_config.json

@@ -57,8 +57,8 @@
         "blockCacheTotal" : 50000000
     },
     "peers":{
-        "minimumScore": 5,
-	"maxStoredPeers": 100,
-	"maxConnect": 3
+        "minimumScore": -4000,
+        "maxStoredPeers": 100,
+        "maxConnect": 3
     }
 }