annotation improvement

Development matplotlib-devel
1

A few days ago I committed a patch with which I tried to improve the
coordinate handling of annotation.
And I updated the annotation guide which describes the change in some detail.

http://matplotlib.sourceforge.net/trunk-docs/users/annotations_guide.html#using-complex-coordinate-with-annotation

And here is an example

http://matplotlib.sourceforge.net/trunk-docs/examples/pylab_examples/annotation_demo3.html

I hope this is useful for others as this has been one of my wishlist.
Regards,

-JJ