8.2
[Validator] Added ExceptionInterface, BadMethodCallException and InvalidArgumentException
fixed CS
Mark ExceptionInterfaces throwable
use cpp
[Validator] add exception when intl component not found
replaced symfony-project.org by symfony.com
[Validator] Refactored the GraphWalker into an implementation of the Visitor design pattern.
[Validator] Completed GroupSequence implementation
[Validator] Renamed Condition to Expression and added possibility to set it onto properties
Prefix all sprintf() calls
removed @since
[Validator] Improved performance of *ContextualValidator::validate()