Controller and template subgenerators will cause an error by default

Fixes #59.

**Problem**: 
A controller generated by `yo kraken:controller` needs an associated model, template, and content bundle created or it will throw errors out of the box.

A template generated by `yo kraken:template` needs an associated content bundle created or it will throw `Error:Content bundle not found: undefined` out of the box.

**Fix**:
Controller subgenerator will invoke model, template, and locale subgenerators.
Template subgenerator will invoke locale subgenerator.

![heh](http://i.imgur.com/I7mT0CS.gif)