Improved default language.yml by ensuring consistency with whether there's a space after the Superheroes tag
Made the player placeholder consistently interpreted across the plugin as Player#getName rather than Player#getDisplayName, in practice this means your name won't show as red if you're an operator.
Added /hero gui <name> to the plugin, this command opens the GUI for the user if ran without a specified name (same as /hero select), if ran with a specified name it opens it for that player. This command requires superheroes.hero like other commands that have "admin" status