TxQR support

[DonaldTsang]

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Issue Description

New feature: TxQR animated QR code support

Description

TxQR is a type of three-dimensional QR code with time as the third dimension to encode more data. Here is a list of items that EFQRCode could have

• [ ] "beautifying" black-and-white TxQR codes using a static logo
• [ ] Combining a TxQR code with a GIF to create a composite TxQR code