Setup a conic gradient, and a block entity which uses the gradient for its fillStyle value
Check that we can successfully manipulate the gradient's start and end coordinates, and its start angle
Check that we can successfully manipulate the palettes's start and end cursors
Check that we can dynamically add and remove color stops
Known issue - For browsers that do not support conic gradients in the canvas this gradient will return a solid, transparent color for fill and stroke styles using it.