The Query String is composed of zero or more "parameter=value" specifications, separated by an ampersand "&". Assume that the Query String parameters and values do not include any of the '?', '%', or '#' characters. Some parameters may be missing a value; an equal sign may or may not be present for such parameters.

Write a function url2params_cell that takes in a URL and returns the Query String parameters and their values, arranged as a 2-column matrix.

url2params_cell('https://en.wikipedia.org:443/wiki/Kitten? printable=yes&download3no&breed%-DAngora#External_links') ans = {'printable'} {'yes'} {'download'} {'no'} {'breed'} {'Angora'}