p5js/common/paisley - Enable tail location to be specified
p5js/common/paisley - Enable tail location to be specified

Allow the position of the tail to be passed in.

Note, there is no validation of the combination of the heading, position and tail position values; and with current (naive) drawing of the curves this may result in overlapping lines.

brianhonohan/sketchbook,brianhonohan/sketchbook,brianhonohan/sketchbook