#54 aafigure: Unify rendering code into the new render() functio

[Leandro Lucarella]

Unify rendering code into the new render() function

A new aafigure.render() function is added to simplify figure rendering and avoid code duplication. Now the command-line tool and the reST directive both use the render() function to do the actual rendering.

This greatly simplify the usage of the aafigure module from external modules (like a sphinx extension I'm working on =).

[Leandro Lucarella]

[Chris Liechti]

thanks, applied to trunk/sandbox/aafigure