fixed exception message
renamed variable to avoid confusion
updated code formatting
removed comment-duplication from class-constants
added pure-php fallback-shim, making the temporary “NotImplementedException” obsolete
enhanced code-readability (at least i hope so)
bugfix: made preset classname fit it's corresponding filename
fix: use the previously invented $GLOBALS['TYPO3_CONF_VARS']['SYS']['unicodeNormalization'] parameter
simplified check of normalization-form constant
switched type-cast from “(integer)” to “(int)”
removed double-quotes from exception message