better interface for set_dragged
fix some problems with constraints
script to test interpretation of quaternions and workplanes
and with points instead of a plane
transform normals and planes to transformation matrices
Python can list entities in a system
provide constructors that take doubles instead of Params
render points and lines in a system
Vector class in slvs library
RenderSystem class in (new) module slvs_solid, two new tests, tests are less verbose (unless you set verbose=True)
Merge branch 'master' of github.com:BBBSnowball/python-solvespace