Resolve crash and stability issues by rolling back socket.io to 1.7.4 (…

…#161)

package.json

@@ -34,6 +34,7 @@
     "build-latest": "gulp prod",
     "build-dev": "gulp dev",
     "build-prod": "gulp prod",
+    "build-i18n": "gulp app:i18n web:i18n",
     "clean": "bash -c 'rm -rf ./dist ./output'",
     "electron": "electron",
     "electron-builder": "build",
@@ -216,8 +217,8 @@
     "session-file-store": "~1.0.0",
     "sha1": "~1.1.1",
     "shortid": "~2.2.8",
-    "socket.io": "~2.0.2",
-    "socket.io-client": "~2.0.2",
+    "socket.io": "~1.7.4",
+    "socket.io-client": "~1.7.4",
     "socketio-jwt": "~4.5.0",
     "sortablejs": "~1.6.0",
     "spawn-default-shell": "~2.0.0",