Merge branch 'release/v0.7.1' into 'master'

CMakeLists.txt

src/file_io/csv_parser.cpp

src/model/input_model.cpp

src/util/defaults.hpp

src/util/grade.cpp

src/view/eliminate_tasks_window/eliminate_tasks_window.cpp

src/view/main_window/students_tab.cpp

src/view/main_window/students_tab.hpp

test/data/testable_objects.cpp