clean up for summer term

01-tree_successor/cpp/Makefile

01-tree_successor/cpp/test_main.cpp

01-tree_successor/cpp/tree_successor.h

01-tree_successor/cpp/tree_successor_more_tests.cpp

01-tree_successor/cpp/tree_successor_test.cpp

01-tree_successor/python/tree_successor.py

01-tree_successor/python/tree_successor_more_tests.py

01-tree_successor/python/tree_successor_test.py

01-tree_successor/task.md

02-splay_operation/cpp/Makefile

02-splay_operation/cpp/splay_operation.h

02-splay_operation/cpp/splay_operation_more_tests.cpp

02-splay_operation/cpp/splay_operation_test.cpp

02-splay_operation/cpp/splay_tests.txt

02-splay_operation/cpp/test_main.cpp

02-splay_operation/python/splay_operation.py

02-splay_operation/python/splay_operation_more_tests.py

02-splay_operation/python/splay_operation_test.py

02-splay_operation/python/splay_tests.txt

02-splay_operation/task.md