reorgenized code

added "functions" folder were all the features of this pack can be used:

Saving

• "save_default" saves a global layout with an id
• "save_custom_layout" saves a personal layout for the player who is running the function

Loading

• "load_custom_layout" load the personal layout for the player who is running the function
• "load_default" load a global layout with an id

• "reset_custom_layout" replaces the personal layout with the equivalent global one