Update domain.rb to use new Solution objects, rather than expect a Hash; also make Rubocop compliant.
Update domain.rb to use new Solution objects, rather than expect a Hash; also make Rubocop compliant.

exosite/MrMurano,tadpol/MuranoCLI,exosite/MrMurano,tadpol/MuranoCLI,tadpol/MuranoCLI