QrCodeChickencom new update! Adding pdf download format

I just added the PDF download format to qrcodechicken.com, and I also restructured the download button section to be more organized. Now instead of three buttons that look awful, you have one unified button, and you can choose which format to download on top. The default is PNG, which is blue; next is SVG, which is purple; and PDF is red. Additionally, I am changing the method for fast downloading by introducing a new shortcut. The original shortcut is "Ctrl + Enter" if there is a textarea, but I realize that on some keyboards there is a long gap between the "Ctrl" and "Enter" buttons, so I changed it to "Shift + Enter" because they are right next to each other. Thank you for reading, and please follow for more updates!