• added Arrays::normalize(), Callback::invokeSafe(), Html::data(), Strings::firstLower()
• Image::from() throws ImageException when is unable to decode file
• Image::place() fixes support for alpha channel
• Callback::closure() returns native closures since PHP 5.4
• Strings::chr() throws Nette\InvalidArgumentException if code point is not in valid range
• Validators::isUrl() accepts underscores in subdomains