CLI arguments set config in headless, minor fixes

--project-requirements == project.requirements
--project-name == project.name
--grader-controller == grader.controller
--headless-path == grader.headless.path
--headless-start == grader.headless.start
--headless-end == grader.headless.end
--logger == grader.logger
--use-framework-gui == grader.useFrameworkGUI = true
--no-framework-gui == grader.useFrameworkGUI = false