Fix combination of rotation and displacement#229
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The SLD spec describes that rotation and displacement of a point symbolizer should be independent of another. For instance, if a point is displaced 20 units vertically and is rotated 45 degrees, the center of the symbol should remain at
[0, 20]from the center.Because OpenLayers applies rotation after displacement, the displaced center will be rotated too.
This PR compensates for OpenLayers behavior and ensures that the combination of rotation and displacement happens according to the SLD spec.