Pillow

/**
* Creates a pillow with the given dimensions
*
* Becareful when placing your pillows on other scad
* objects as if it is flat on the surface it can create a
* 2-manifold error.
* The simpliest way to over come this is to 'embed' the
* pillow slightly into the object (1mm is enough) where ever
* the pillow touches a flat surface.
*/
/**
* A nice little throw pillow
* pillow(20, 10, 10);
*/