re-add engine.io-client as suggested

package-overrides/npm/engine.io-client@1.5.1.json

@@ -0,0 +1,15 @@
+{
+  "dependencies": {
+      "xmlhttprequest" : "git+https://github.com/rase-/node-XMLHttpRequest.git#add/ssl-support",
+      "has-cors": "1.0.3",
+      "ws": "0.7.1",
+      "component-emitter": "1.1.2",
+      "indexof": "0.0.1",
+      "engine.io-parser": "1.2.1",
+      "debug": "2.1.3",
+      "parseuri": "0.0.4",
+      "parsejson": "0.0.1",
+      "parseqs": "0.0.2",
+      "component-inherit": "0.0.3"
+  }
+}

package-overrides/npm/engine.io-client@1.6.8.json

@@ -0,0 +1 @@
+{}

package-overrides/npm/socket.io@1.4.5.json

@@ -1,5 +1,5 @@
-{"map":
 {
+  "map": {
     "socket.io-client/package": "socket.io-client/package.json"
   }
 }