borglab/gtsam: 4.2a7

Many new changes since April 08. Many thanks to contributors @varunagrawal, @shteren1, @ProfFan, @d-vo, @magicbycalvin, @gchenfc, @jlblancoc, @johnwlambert, @senselessDev, @akshay-krishnan !!!! What's Changed Get Sim2 working by @varunagrawal in https://github.com/borglab/gtsam/pull/1090 DecisionTreeFactor prune method by @varunagrawal in https://github.com/borglab/gtsam/pull/1151 Update Wrapper by @varunagrawal in https://github.com/borglab/gtsam/pull/1149 Improve Gaussian Conditional printing by @varunagrawal in https://github.com/borglab/gtsam/pull/1147 Pose2::Align by @dellaert in https://github.com/borglab/gtsam/pull/1150 Record number of assignments for each leaf by @varunagrawal in https://github.com/borglab/gtsam/pull/1154 added wrapper for ProjectionFactorRollingShutter by @shteren1 in https://github.com/borglab/gtsam/pull/1159 Fix the race! by @ProfFan in https://github.com/borglab/gtsam/pull/1158 InvDepthFactor3: Fix wrong derivative H3 by @d-vo in https://github.com/borglab/gtsam/pull/1157 Updated scaling factors for proper geometric representation of uncertainty ellipses by @magicbycalvin in https://github.com/borglab/gtsam/pull/1067 DecisionTree Refactor by @varunagrawal in https://github.com/borglab/gtsam/pull/1155 New maxNrAssignment scheme for pruning by @varunagrawal in https://github.com/borglab/gtsam/pull/1156 Fix slow dynamic cast by @ProfFan in https://github.com/borglab/gtsam/pull/1168 Fix robust deserialization by @ProfFan in https://github.com/borglab/gtsam/pull/1169 Add camera and Calibration Jacobians in Python by @ProfFan in https://github.com/borglab/gtsam/pull/1171 Regenerate python utils files upon edit by @gchenfc in https://github.com/borglab/gtsam/pull/1176 noise models: Add getters for all model parameters by @jlblancoc in https://github.com/borglab/gtsam/pull/1175 Add Similarity(2) support in gtsam/geometry by @johnwlambert in https://github.com/borglab/gtsam/pull/918 Fix warnings and docs by @varunagrawal in https://github.com/borglab/gtsam/pull/1181 Added some utilities for better using the SfM parts of GTSAM in Python by @ProfFan in https://github.com/borglab/gtsam/pull/1185 Some fixes by @varunagrawal in https://github.com/borglab/gtsam/pull/1187 Fix uncertainty ellipses in python helpers by @senselessDev in https://github.com/borglab/gtsam/pull/1177 Adding options to translation averaging to support betweenfactor translation priors by @akshay-krishnan in https://github.com/borglab/gtsam/pull/1190 All uncertainty ellipses now contain 95% by @dellaert in https://github.com/borglab/gtsam/pull/1193 Remove user flag for pip install by @varunagrawal in https://github.com/borglab/gtsam/pull/1195 Wrap triangulateSafe by @dellaert in https://github.com/borglab/gtsam/pull/1194 Python optimizer iteration hook by @gchenfc in https://github.com/borglab/gtsam/pull/1127 New Contributors @d-vo made their first contribution in https://github.com/borglab/gtsam/pull/1157 Full Changelog: https://github.com/borglab/gtsam/compare/4.2a6...4.2a