The big feature delivered on this new version is the Solver. The line tool uses a new Solver that started to work properly at an acceptable speed.
Replaced Rectangle tool with a rectangle having different constraints on it. The Solver can modify it now.
The new Solver supports: parallel, perpendicular, horizontal, vertical, point on point and point on line constraints.
The new constraints are covered with unit tests, these can be used as coding samples.
You can download the new version here.
Next iteration the focus will be on improving the solver, making more fixes at the spline tool and if there is time maybe also enhance the trim tool. With these the 2D tools will be stabilized and we'll move on stabilizing the 3D ones.