Add CoffeeScript support

Solve #8
Add CoffeeScript prompt
Add CoffeeScript versions of app source files
Did not convert gulpfile.js to gulpfile.coffee
Add CoffeeScript support

Solve #8
Add CoffeeScript prompt
Add CoffeeScript versions of app source files
Did not convert gulpfile.js to gulpfile.coffee
Merge pull request #9 from bradyisom/coffeescript

Add CoffeeScript support