Better commands and download !

• Create new placeholder %zmenu_player_next_page%, return player next page
• Create new placeholder %zmenu_player_previous_page%, return player previous page
• Create new requirement: playername, Check if a text is a player nickname
• Fixed the display of a button with a playerHead if the text is not a playerHead. This avoids server lag when opening inventory.
• Fixed Numbers saved in PlayerData are not Numbers after a restart. #59
• Added Placeholder in head url #58
• Added Action - Data placeholder #56
• Expand player data commands with add & subtract #46
• New features for Commands (Perform action and Auto-completion) #26
• You can now open a book
• Create /zm download <link> command. You can download configuration files from links, discord links for example.