Expands from the above weight balanced treemap by introducing x and y alignment values, such that the rectangles are also aligned in the x and y axis. The x_align nad y_align are purely for alignment ...

Based on algorithm from Bruls, Huizing, van Wijk, "Squarified Treemaps", but implements it differently. The function returns a list of dicts (i.e., JSON objects), each one a rectangle with coordinates ...