Move express and connect to optionalDependencies

Author: mattrobenolt

package.json

@@ -23,13 +23,15 @@
     "cookie": "0.1.0"
   },
   "devDependencies": {
-    "connect": "*",
-    "express": "*",
     "mocha": "*",
     "should": "~3.3.1",
     "nock": "*",
     "glob": "*",
     "mock-udp": "*",
     "coffee-script": "~1.6.3"
+  },
+  "optionalDependencies": {
+    "connect": "*",
+    "express": "*"
   }
 }