Make paginated result sorted by asc order by default
Rework backend client
Separate api model from api resource and make them modular
Fix bugs
Update specs
Update backend client in admin
Rescue backend error in admin controllers, update pagination helper
Don't blank rescue with empty hash
Fix a few backend client bugs
Update README
Add simple rake task for updating backend client in admin
Parse user birthdate in backend client
Return currency in payment method, transaction, order payloads
Add font awesome and bootstrap gems
Add basic layout for the whole application
Add basic main index page
Add users index page