test_mesh: Fix bending_triples unit test
Add curvature computation and surfaces of revolution

These are needed for constant mean curvature surfaces of revolution.
Move to_python overloads for Segment into Segment?d.h
Capsule.h: Reformat
geometry/platonic: Support closed and half-closed surfaces of revolution

This is useful for building meshes of capsules, for example.
Add capsule_mesh and expose some volume() methods
removed output from decimate
Merge branch 'master' of github.com:otherlab/core
Merge branch 'windows'
make querying empty trees safe
added ReleaseDLL (Otherlab) config
Merge branch 'master' into windows
ifdef to_python with OTHER_PYTHON
added copysign to curvature