Getting eigenpy (and pinocchio) to compile on macOS with python3 took me some effort. The required trick turned out to "only" add `-DPYTHON_EXECUTABLE=\`which python3\`` to the cmake argument.

Do you think this is worth adding to the README.md/installation instructions? I am happy to provide something similar for pinocchio as well.

Fix compatibility issue with Eigen 3.3.5

Register Eigen::MatrixBase

Handle zero-size vector

Python 3 tests & CI

cf. https://github.com/travis-ci/travis-ci/issues/5821

Python 3 is tested by gitlab anyways.

Improve compatibility with Python3 and recent Boost versions >= 1.67.0

Fix boost python detection problem to allow multiple python interpreters

Handle conversion between compatible scalar types

Fix bug when converting matrix of dim 1x1

Check registration of {Quaternion,AngleAxis} classes

Add {from,to}EulerAngles convertor