Require Windshaft 0.8.4 to add dump of cache stats on SIGUSR1

app.js

@@ -45,3 +45,7 @@ ws.listen(global.environment.port, global.environment.host);
 ws.on('listening', function() {
   console.log("Windshaft tileserver started on " + global.environment.host + ':' + global.environment.port);
 });
+
+process.on('SIGUSR1', function() {
+  ws.dumpCacheStats();
+});

cluster.js

@@ -57,3 +57,6 @@ cluster.listen(function(cb) {
   console.log("Windshaft tileserver started on port " + global.environment.port);
 });
 
+process.on('SIGUSR1', function() {
+  ws.dumpCacheStats();
+});

npm-shrinkwrap.json

@@ -254,7 +254,7 @@
       }
     },
     "windshaft": {
-      "version": "0.8.3",
+      "version": "0.8.4",
       "dependencies": {
         "express": {
           "version": "2.5.11",

package.json

@@ -22,7 +22,7 @@
         "node-varnish": "0.1.1",
         "underscore"  : "~1.3.3",
         "grainstore"  : "~0.10.10",
-        "windshaft"  : "~0.8.3",
+        "windshaft"  : "~0.8.4",
         "step": "0.0.x",
         "generic-pool": "1.0.x",
         "redis": "0.7.2",