Created the dictator entry and group class.
Added dictator relationship, getter/setter functions.
Added the dictator treatment for validation.
Added PHPDoc to functions.
Added PHPDoc to functions.
Added PHPDoc function description for saveGroups
Added subject matching for the ultimatum, trust, and dictator game.
Added the dictator endowment parameter to the "Add New Session" form.
Added the dictator game data to the experiment view composer.
Added the Dictator game endowment parameter to the "Add New Session" template.
Added conditional display of the dictator treatment to the "Add New Session" template.
Created the dictator game treatment and group migration classes.