Added option to create persistent fs inside LUKS container.
Had to change to #!/bin/bash to parse interactive user input for the encryption passphrase.
The _freeloop=$freeloop part is kind of bad style, but I kept it for now to keep changes minimal.
2. Optimization for booting Solus
3. Optimization for booting .efi file
4. support deepin-live iso
5. support Endless OS
6. framework for booting .img file
