* Draft: make_sketch.py: Use sketcher methods to add constraints
A sketch object has its own methods to add coincident, horizontal and vertical constraints. Using those methods allows to simplify the make_sketch.py code. The new code applies the mentioned constraints to the whole sketch, instead of per object. The old code would not add coincident constraints between seperate, but connected, objects. the new code does.
Note that the code for point objects (not changed in this PR) does not work properly.
* Fix 2 issues
* The Sketcher detect functions need a tolerance argument.
* obj.Shape.copy() does not work properly for a Draft_Point. As a workaround a Part Vertex is created instead.
This includes `make_arc_3points`, `make_array`, `make_bezcurve`,
`make_block`, `make_bspline`, `make_circle`, `make_circulararray`,
`make_clone`, `make_copy`, `make_dimension`, `make_drawingview`,
`make_ellipse`, `make_facebinder`, `make_fillet`, `make_label`,
`make_line`, `make_orthoarray`, `make_patharray`, `make_point`,
`make_pointarray`, `make_polararray`, `make_polygon`,
`make_rectangle`, `make_shape2dview`, `make_shapestring`,
`make_sketch`, `make_text`, `make_wire`, `make_wpproxy`.
These are added to the `draftmake` Doxygen group
so that the functions contained in each module are listed
appropriately in the automatically generated documentation.
