Add boilerplate for controllers and routes

Signed-off-by: Tobias Eidelpes <tobias@eidelpes.info>

app/controllers/courses_controller.rb

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+class CoursesController < ApplicationController
+end

app/controllers/people_controller.rb

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+class PeopleController < ApplicationController
+end

app/controllers/projects_controller.rb

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+class ProjectsController < ApplicationController
+end

app/controllers/theses_controller.rb

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+class ThesesController < ApplicationController
+end