CustomAnvil

• Support for ExcellentEnchants
• Add enchantment merge level limit (& config gui for to configure it)
• Use namespace for enchantment instead of name (still use name as backup)
• Deprecated API method using enchantment name and replaced them with namespace methods
• Work with most plugin using anvil-gui by wedjd
• Improved main logic code readability (but may break thing)

Multiplies changes (improved logic, namespace...) make this version likely to have something broken. Next version(s) may be fix