Default: Save PNG without background

[GoogleCodeExporter]

Should be better if the option to save the images (specially the PNG format) 
could be by default without the background.
Attached follow a SVN patch file with the suggested change. Made into the 
trunk2 folder.

Original issue reported on code.google.com by rodcesar...@gmail.com on 15 Nov 2012 at 4:31

Attachments:

• MainForm.cs.patch