Added option to change template language from jade to either Swig or vanilla HTML.
Modularized Grunt tasks into seperate files for easier management
Updated tests for new view options
Updated NPM dependencies
* Added Ability to use Swig templates as well as Vanilla HTML rather than just Jade
* Modularized all grunt configuration and tasks in a new `grunt/` folder
* Updated view subgenerator to create Swig and HTML files in addition to Jade
* Updated NPM dependencies
* Added new unit tests to cover latest changes