Add http-status-codes library

Author: markstuart

package.json

@@ -33,6 +33,7 @@
   "dependencies": {
     "body-parser": "^1.14.1",
     "debug": "^2.2.0",
+    "http-status-codes": "^1.0.5",
     "inflection": "^1.7.2",
     "lodash": "^4.0.0",
     "type-is": "^1.6.9"