fix for text3D not passing text kwargs

In mpl_toolkits.mplot3d, I noticed that if I want to add text in the
Axes3D, I need to use Axes3D.text3D . However, that method doesn't
pass in kwargs to set the text properties onto the Axes.text method.
Hence, I made this simple modification that passes kwargs on text3D on
to text so that the properties are properly applied. Attached is the
diff against an up-to-date svn...

This has also been submitted as sourceforge bug ID 2972928

text3dkwargs.diff (852 Bytes)