added some TODO/@todo tags to mark possible places of missing unicode-nomalization-awareness
added more links to the class descriptions, updated constructor's description and implemention (added $implementation argument)
updated feature-configuration preset for unicode-normalization; added a custom fallback preset too
added UnicodeNormalizer's configuration parameters to TYPO3's DefaultConfiguration
update UnicodeNormalizer implementation
added PHP's “intl” extension to TYPO3's composer.json as a suggestion, as it provides the potentially faster unicode-Normalizer implementation
bugfix for UnicodeNormalizer::isNormalized - always return TRUE (and not the $input) if no implementation is available
added unicode-normalization to FAL's LocalDriver
added unicode-normalization to the core extension's BasicFileUtility
added another unicode-normalization related TODO tag to the “backend” extension's BackendController
added unicode-normalization to the “frontend”-extension's TypoScriptFrontendController