Inclusive Search functionality

index.html: added pathInclusion checkbox
MItem.js, MSpell.js: added inclusive search functionality to search
filters
master.css: added inclusive-search class

This change allows the user to search for all spells/items containing a single path, as opposed to having to search for specific combinations. ex. searching fire spells normally brings up spells that use fire paths exclusively. Searching fire spells inclusively brings up all spells that have a fire path.