rename more stuff

CMakeLists.txt

TurTLE/DNS.py

TurTLE/PP.py

TurTLE/TEST.py

TurTLE/__init__.py

TurTLE/__main__.py

TurTLE/_base.py

TurTLE/_code.py

TurTLE/test/B32p1e4_checkpoint_0.h5

TurTLE/test/__init__.py

TurTLE/test/test_Parseval.py

TurTLE/test/test_bfps_NSVEparticles.py

TurTLE/test/test_bfps_resize.py

TurTLE/test/test_fftw.py

TurTLE/test/test_interpolation.py

TurTLE/test/test_particle_clouds.py

TurTLE/test/test_particles.py

TurTLE/tools.py