Revision 1591

Make the renderers deal correctly with raw vs. python level
representation of shape geometries

* Thuban/UI/baserenderer.py (BaseRenderer.low_level_renderer):
Return a flag useraw in addition to the callable and the parameter
to indicate whether the callable can deal with the raw shape data
or uses the higher level python lists of coordinates. The callable
now should accept either the raw data or the return value of the
shape's Points() method.
(BaseRenderer.draw_shape_layer): Adapt to the low_level_renderer
change
(BaseRenderer.projected_points): Instead of the shape id use the
points list as parameter.
(BaseRenderer.draw_polygon_shape, BaseRenderer.draw_arc_shape)
(BaseRenderer.draw_point_shape): Adapt to projected_points()
change and accept the points list as parameter instead of the
shape id.

* Thuban/UI/renderer.py (MapRenderer.low_level_renderer): Return
the useraw flag as required by the BaseRenderer
(ScreenRenderer.draw_shape_layer): Adapt to low-level renderer
changes.

* test/test_baserenderer.py
(TestBaseRenderer.test_point_with_classification): New test for
rendering a map with classifications.