feat(gen): new sub-generator for scafolding-out build tools only
feat(gen): Add new sub-genreator for scaffolding out build files only
fix(build gen): add scaffolding for package.json - grunt won't work without the npm modules installed
feat(build gen): Add sub-generator to grunt-enable your project.

Basic sub-generator for scaffolding out build tools for your project. Will generate a gruntfile and package.json so that you can run grunt to serve up your project and make changes with jshint, jsbeautify and live-reload, etc.

Closes #75