documentation updates

README.md

autocnet/camera/camera.py

autocnet/camera/utils.py

autocnet/cg/change_detection.py

autocnet/control/control.py

autocnet/graph/edge.py

autocnet/graph/network.py

autocnet/graph/node.py

autocnet/io/db/connection.py

autocnet/io/db/controlnetwork.py

autocnet/io/keypoints.py

autocnet/matcher/cpu_decompose.py

autocnet/matcher/cpu_outlier_detector.py

autocnet/matcher/cpu_ring_matcher.py

autocnet/matcher/cross_instrument_matcher.py

autocnet/matcher/cuda_extractor.py

autocnet/matcher/naive_template.py

autocnet/matcher/subpixel.py

autocnet/spatial/overlap.py

autocnet/transformation/fundamental_matrix.py