Generate a 4x4 transformation matrix which can pass into multmatrix to scale its child elements using the specified vector.
Since: 1.1
Parameters
v: Elements will be scaled using the vector.
Examples
use <matrix/m_scaling.scad>
cube(10);
translate([15, 0, 0])
multmatrix(m_scaling([0.5, 1, 2]))
cube(10);

