1.20 update

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

README.md

@@ -30,6 +30,7 @@ Books without Borders has got your back!
   value
 - Change generation of books. Create tattered books for your RPG server!
 - Optionally, make it impossible to duplicate the original version of a book
+- Optionally, hit a bookshelf to display the contained books. Sneak to destroy bookshelves with this enabled
 
 #### Group encryption
 
@@ -98,6 +99,7 @@ An in-game description of available commands is available through the /bwb comma
 | bookswithoutborders.setbookprice           | Allows player to set the cost of creating a book                                                         |
 | bookswithoutborders.setgeneration          | Allows player to change the generation of a book (Original, Copy, Copy of Copy)                          |
 | bookswithoutborders.clear                  | Allows player to clear the contents of the held writable book                                            |
+| bookswithoutborders.peekbookshelf          | Allows player to left-click a bookshelf to see the contents of the shelf                                 |
 
 ### Signs
 
@@ -106,13 +108,13 @@ line.
 
 #### Give sign
 
-The **_give_** sign must have **\[Give]** on its second line. The third and fourth line contains the book to be loaded.
+The **_give_**-sign must have **\[Give]** on its second line. The third and fourth line contains the book to be loaded.
 This can either be a numerical id pointing to a publicly saved book, or the full text identifier of the book (book name,
 author).
 
 #### Encrypt sign
 
-The **_encrypt_** sign must have **\[Encrypt]** on its second line. The third line must contain the encryption key The
+The **_encrypt_**-sign must have **\[Encrypt]** on its second line. The third line must contain the encryption key The
 fourth line can be empty or contain "dna" for dna-based encryption.
 
 #### Decrypt sign
@@ -136,4 +138,5 @@ The **_decrypt_** sign must have **\[Decrypt]** on its second line. The third li
 | Author_Only_Unsign                     | Whether to only allow the author of a book to unsign it                                                                                                                                        |
 | Author_Only_Save                       | Whether to only allow saving a player's own books with /savebook                                                                                                                               |
 | Format_Book_After_Signing              | Whether to automatically format every book when it's signed                                                                                                                                    |
-| Change_Generation_On_Copy              | Whether to display "COPY" or "COPY_OF_COPY" instead of "ORIGINAL" when a book is copied. This also uses the vanilla behavior where a copy of a copy or tattered book cannot be copied further. |
+| Change_Generation_On_Copy              | Whether to display "COPY" or "COPY_OF_COPY" instead of "ORIGINAL" when a book is copied. This also uses the vanilla behavior where a copy of a copy or tattered book cannot be copied further. |
+| Enable_Book_Peeking                    | Whether to enable hitting a chiseled bookshelf to see the shelf's contents. Sneaking is required to destroy a bookshelf if this is enabled.                                                    |