adding the search controller helper
switching the product search to use solr search instead of ransack
adding the spree api key to the user response
create the user api key when the user is created
UI Change : adding the spree categories to top nav bar
The search bar to retain the category even after the search results are shown
Renaming billing address to shipping address, and hiding the shipping address div so that the user can enter only one address
Reducing the checkout page to have bare minimum address fields
fixing main page search