See github for changes

Added PR_UINT32_MAX to fileHandling.js which is used in the hash generation
Added ClientFile::copy and ClientFileService::copyFile
Added ClientFileService::CRYPTO_* constants for all the hash types
Added ClientFileService::ConvertToNativePath which converts a path string to a native one
Changed ClientFileService::getDirSeparator to a static function
Changed the coding style of fileHandling.php.inc