add unit tests

libraries/logger/package.json

@@ -9,7 +9,17 @@
   "version": "1.5.6",
   "dependencies": {
     "bunyan": "1.5.1",
+    "chai": "",
     "coffee-script": "1.12.4",
-    "raven": "^1.1.3"
+    "grunt": "^0.4.5",
+    "grunt-bunyan": "^0.5.0",
+    "grunt-contrib-clean": "^0.6.0",
+    "grunt-contrib-coffee": "^0.11.0",
+    "grunt-execute": "^0.2.2",
+    "grunt-mocha-test": "^0.11.0",
+    "raven": "^1.1.3",
+    "sandboxed-module": "",
+    "sinon": "",
+    "timekeeper": "^1.0.0"
   }
 }