- new optional arguments to occ/addThruSections (#1976)

new optional arguments to occ/addCircle, occ/addEllipse, occ/addDisk, occ/addTorus and occ/addWedge, allowing to specify main axes (cf. #1841)

occ/getCurveLoops and occ/getSurfaceLoops now also return the underlying curves and surfaces (cf. #1813)

- new mesh/setVisibility

    * new functions: mesh/addHomologyRequest, mesh/clearHomologyRequests
    * changed argument of mesh/computeHomology + removed mesh/computeCohomology

- new optional arguments to model/addPhysicalGroup so that one can name a group at the time of creation

- pass optional dimTags to mesh/removeDuplicateNodes so we can merge nodes on parts of models

- new Mesh.RecombineNodeRepositioning and Mesh.RecombineMinimumQuality options to fine-tune tri->quad recombination
- new Mesh.StlLinearDeflectionRelative option to select absolute/relative linear deflection in STL generation

- improved occ/addCurveLoop: curves can now be provided in random order
- improved occ/addBsplineFilling: if the bounding curves are not BSplines, automatically convert them to BSplines

tutorial/ -> tutorials/

new API functions view/option/{set,get}{Number,String,Color} + renamed view/copyOptions as view/option/copy. This allows to more cleanly set view options given the unique tag of the view; the general gmsh/option/{set,get}{Number,String,Color} can still be used to set view options given its index. Cf. #1649.

color options in the API can now be specified with the middle "Color." string, as in .geo files (cf. #1649)

getEdge() now returns the orientation w.r.t. the global convention n1 < n2 where n1 and n2 are the node tags of the start and end extremities of the edge

enable occ/importShapesNativePointer for all languages and not only C/C++ + document how to use it with PythonOCC: thanks @igormaurell!