Missing some settings in the config.yml

[Florke64]

To make plugin more customizable - there should be added more sections to the config file.

• Auto-save frequency - int value; proposed name: "auto_save_frequency"; auto-save peroid in minutes
• Multiplier Boss Bar update frequency - int value; proposed name "boss_bar_update_frequency"; boss bar update peroid in seconds
• Custom fuel - list of Materials that can be used to fill the stone machine with auto-smelting uses
• Mute logs - list of keywords to mute in console log (Message.java)