Merge simplified euler to optic flow

navipy/trajectories/test_triangle.py

navipy/trajectories/tools.py

navipy/trajectories/transformations.py

navipy/trajectories/triangle.py

orientation/Orientation_two_markers.rst

orientation/bumblebee_orientation.rst

orientation/examples/bumblebee_markers.py

orientation/examples/bumblebee_thorax_orientation.py

orientation/examples/triangle_isocel.py

orientation/examples/triangle_pitch.py

orientation/examples/two_markers.py

orientation/examples/yawpitchroll.py

orientation/index.rst

orientation/media/marked_bumblebee.png

orientation/orientation.rst

orientation/rotation.rst

samples/Untitled.ipynb

samples/asv_catchment_area.py

samples/asv_homing_grid.py

samples/plots/asv_attractors_grid_channel_0.svg