caSCADe lazy man library

my OpenSCAD library to stop wasting so much time on stupid things like forgetting not to write cylinder([L,W,H]) and positionning amongst other things.

I will not lie: this library aims to replace the cube() function ; it ttreats all basic solids (cubes and variations of the prismatic cylinder) the same way when it comes to positionning (the cylinder is enclosed in the box defined by the cube of same paramters). Elliptical cylinders are made available, as well as "clavette" and
hollow prisms.

PARAMETERS

* _fn_ number of faces. 0 is a special case for the cube, it defaults to this base "box" in which to fit the solid. same as cube() parameters
* _center_ whether to center the solid on each axis. defaults to [true,true,false], which is the default behaviour of the cylinder, while [false,false,false] will mimic the behabiour of the cube() function
* _oblong_ do we treat an elongated cylinder as an ellipse (false) or as a hull() of two smaller cylinders (true, default).