fix: make gulp depedencies available for prod installs

* fixes a bug introduced with a8c40a9
* the `init` sub command depends on `gulp` and `gulp-git`

closes #153

Author: marionebl

package.json

@@ -51,8 +51,6 @@
     "chai": "3.5.0",
     "codecov.io": "0.1.6",
     "ghooks": "1.0.3",
-    "gulp": "3.9.1",
-    "gulp-git": "1.7.0",
     "istanbul": "0.3.22",
     "mocha": "2.4.5",
     "node-uuid": "1.4.7",
@@ -68,6 +66,8 @@
     "detect-indent": "4.0.0",
     "find-node-modules": "1.0.1",
     "glob": "7.0.0",
+    "gulp": "3.9.1",
+    "gulp-git": "1.7.0",
     "inquirer": "0.12.0",
     "lodash": "4.6.1",
     "find-root": "^1.0.0",