Move test packages to dev dependencies

Mocah and Should are only used for testing purposes and absolutely do
not belong as a core dependency.

Issue #15 Modernize development environment

package.json

@@ -5,11 +5,12 @@
     "bluebird": "^2.9.25",
     "express": "^4.12.3",
     "lodash": "^3.8.0",
-    "mocha": "^2.2.4",
-    "should": "^6.0.1",
     "uuid": "^3.0.0"
   },
-  "devDependencies": {},
+  "devDependencies": {
+    "mocha": "^2.2.4",
+    "should": "^6.0.1"    
+  },
   "description": "A distributed API for closed captioning live-streams.",
   "main": "index.js",
   "keywords": [