Spin.js no longer needed
Use FontAwesome spinners, add toggles and dog name
Some styling
Add dog name, ignore null fields, (de)serialize cancellationCode
Multiple changes

Remove debug controller methods, guard against null-values in Riak, set
cancellationCodes to null before sending, escape HTML in signup fields
Update routes
Add some formatting and fixes
Add fields for dog name and email address (for cancellation code)