New window for (shp, pal) >> png.
Added Toolbar (how do you make drop downs?).
Added List<Form> ext GetIndexer(string)
	uses IFormIndexer

Separated ConvertWindow into two forms.

Added PngReader.
	Packaged [png >> shp]s lose frame metadata.
Reorganized menubar a little.
Added a warning to [png >> shp] window.
Remove OSSHPBuilder Pascal source.
Update README.
Create COPYING
Merge pull request #6 from Mailaender/csport

Added the text of the GNU GPLv3