Adds an optional real encryption mode, which encrypts pages using AES, without saving plaintext.
Re-implements the old magic encryption in non-real encryption mode.
Fixes incorrect key generation for use in the substitution cipher and the gene cipher.
Removes the option for saving books as txt.
Adds tests for all encryption methods.
Saves all necessary decryption data when storing encrypted books.
Removes the old book updating code.
Adds an optional feature which displays the contents of a bookshelf when left-clicked. Sneaking must be used to destroy the bookshelf when enabled.
Updates depreciated sign code.
Bumps the API version to 1.20
Builds against 1.20
