New theme: Verification; new GUI for Espece

src/app/calculators/espece/config.json

src/app/calculators/espece/en.json

src/app/calculators/espece/fr.json

src/app/calculators/verificateur/config.json

src/app/config.json

src/assets/images/themes/verification.jpg

src/locale/messages.en.json

src/locale/messages.fr.json