Use multer instead of express-fileupload

Author: neich

package.json

@@ -7,14 +7,14 @@
   },
   "dependencies": {
     "body-parser": "^1.18.2",
-    "express-fileupload": "^0.4.0",
     "express-session": "^1.15.6",
     "favicon": "^0.0.2",
     "firebase": "^5.8.4",
     "json-server": "^0.14.2",
     "jsonschema": "^1.2.2",
     "method-override": "^2.3.10",
     "morgan": "^1.9.0",
+    "multer": "^1.4.1",
     "path": "^0.12.7",
     "peer": "^0.2.10",
     "peerjs-server": "^0.2.9",