Introduce FileShapeStore

[Bernhard Herzog]

Jan-Oliver Wagner <jan at intevation.de> writes:

>      def BoundingBox(self):
> -        """Return the bounding box of the shapes in the shapestore.
> +        """Return the bounding box of the shapes in the shape store.
>  
> -        The coordinate system used is whatever was used in the shapefile.
> -        If the shapefile is empty, return None.
> +        The coordinate system used is whatever was used in the shape store.
> +        If the shape store is empty, return None.

Didn't notice this earlier: there is a reason the doc-string said
"shapefile".  This is in the ShapefileStore so the coordinate system is
whatever is used in the underlying shapefile.

Other than that, check it in already :)

   Bernhard


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