add load_vggdata.py
add 2d visualizer of merton dataset
add 3d visualizer for merton dataset
add sfm.py
add compute_right_epipole()
draw epipoles in ch05_epipole.py
add triangulation (known matched 2d points, known camera -> 3d point), demo
add camera recovery (known matched 2d-3d points -> camera matrix), demo
add compute_P_from_fundamental()
start at end-to-end 3d recovery example