fix(gulp:jshint): include jshint alongside gulp-jshint

it's a peerDependency of gulp-jshint, so npm 3 won't install it for us

Author: Awk34

Diff for: app/templates/_package.json

@@ -62,6 +62,7 @@
     "gulp-istanbul-enforcer": "^1.0.3",
     "gulp-jscs": "^3.0.2",
     "gulp-jshint": "^2.0.0",
+    "jshint": "2.9.2",
     "gulp-livereload": "^3.8.0",
     "gulp-load-plugins": "^1.0.0-rc.1",
     "gulp-minify-css": "^1.1.6",