add getShape method to shapefileObj

[sgillies@…]

Add a getShape method.  Given a shape index, returns the shape.

[sgillies@…]

Done.

[dmorissette]

For the record this method was already there in PHP MapScript, so there is
nothing to do for the PHP version.

I thought the shapefileObj::getShape() method was there in the SWIG version as
well. Was it just deleted by accident or did I overlook something important?

[sgillies@…]

shapefileObj is a neglected backwater in the SWIG mapscript.  This is the
first time I've ever looked into it.  There was a 'get' method which takes
a shape as an argument, but that's bad style and inefficient (doubles calls
to msInitShape, etc).

[dmorissette]

Ah, makes sense now. Thanks.