Script updated to v1.2

This Amiga IFF/ILBM Export Script has been updated today and includes the following new enhancements:

• Dialog button shortcuts have been added.
• Added a new checkbox option to export just the sprite's palette (CMAP). This is useful for Deluxe Paint users and Amiga game developers that work in Blitz Basic 2 and any other tools that allow you to load in an IFF palette file.  The file essentially consists of just the IFF CMAP chunk.
• Miscellaneous code cleanup.