Slip39

Verified correct BIP-38 Paper Wallet encryption.

Works on macOS, Win32 and Linux.

Printing directly to printers works using python3 -m slip39.gui or sli39-gui, but not yet via the SLIP-39 macOS App.

GUI works on macOS, Windows and Linux.

DO NOT USE for production: all Paper Wallets are encrypted with the fixed password "password".

Simplified the selection of destination directory, so it only occurs at PDF Save time.

Also, corrected the (not Trezor compatible) SLIP-39 passphrase handling.

Improved Paper Wallet handling, and separate Paper format (eg. Letter, Legal, A4, Photo), and Card Layout (eg. index, credit, photo, etc.) DO NOT USE for production: all Paper Wallets are encrypted with the fixed password "password".

Outputs "Paper Wallets" for BTC, ETH, LTC and DOGE, compatible with various "software" wallets on web browsers (eg. Metamask, Brave), and mobile phones.

Prints standard BIP-38 encrypted wallet private keys for Bitcoin and related cryptocurrencies. DO NOT USE for production: all Paper Wallets are encrypted with the fixed password "password".

For Ethereum, outputs encrypted JSON wallet data.

All packages are signed and notarized, and should be installable without problems
o No packages yet accepted by macOS App Store

Optimized the build process.