v0.1.13: Add Validations
Add validation (#15) * Add a named constructor for Tag * Add validation for some classes * Update README.md * Restore create_tag for backward compatibility * Update .gitignore * Fix a typo
Add validation (#15) * Add a named constructor for Tag * Add validation for some classes * Update README.md * Restore create_tag for backward compatibility * Update .gitignore * Fix a typo