Generated directives should default to templateUrl and give html file in appropriate location

[JaKXz]

Noticed using generator version 0.9.5. From the Angular Docs:

Best Practice: Unless your template is very small, it's typically better to break it apart into its own HTML file and load it with the templateUrl option.

The location of the html file can be discussed, my assumption for now is to put it in the app/views/directives/ folder.

[eddiemonge]

The template is very small, <div></div>, 11 characters small. You can break it out into its own file if you want. When #277 lands then it'll be close to the same thing anyway.