New:

• Added negation filter - using it before any search filter negates the result (e.g if you search -log it will hide any item with "log" in its name
• Multiple filters can be used in the search bar now
• Added NerUtil class with utilities that can allow potentially making recipe books in guis
• Added VisibilityRule to allow conditionally hiding items
• Added setNamespace and setNamespaces to better allow adding items to a namespace
• Added addNestedFilter for making filters that affect other filters

Changes:

• Group icons now show the number of items in that group in the tooltip