*temporarily* add template renderers to package.json just so our unit

 tests actually mean something in Travis/GitHub

Author: geoffp

package.json

@@ -10,7 +10,8 @@
     "html-entities": "^1.2.0",
     "matchdep": "^1.0.0",
     "mustache": "^2.2.0",
-    "handlebars": "^4.0.5"
+    "handlebars": "^4.0.5",
+    "underscore": "^1.8.3"
   },
   "devDependencies": {
     "bs-html-injector": "^3.0.0",