Modified: Nested messages when validating attributes and keys.
Modified: composer.json
Removed: PEAR files
Added: PHPUnit suite file.
Refactoring: Library directory.
Refactoring: Tests directory.
Updated: Tests bootstrap file.
Removed: Old suite file.
Modified: Validation test for nested validation messages.
Removed: Symfony and Zend validation classes.
Removed: Deprecated validators.
Updated: Docs.
Removed: Brazilian localized validators.
Updated: Docs.