added the spin.js package
added a loading view
added loading view to categories route and updated the main app view
getOrFetch method now returns a promise
added loading view to the product and category routes
added travis-ci config file
remove older node versions
Merge pull request #19 from SimpleReviews/feature/loading

Feature/loading
added a build script
depoly to heroku on every push
Merge branch 'master' of https://github.com/SimpleReviews/core-app
use environment variables
use dev script to start app
include browserify in dependencies
Merge pull request #20 from SimpleReviews/prod-reviews

added page header class to product page
review form styling
review input style update