IcoFX 2.4

# New features:
- Curves window for image adjustments
- Levels window for image adjustments
- Color selection on the Tools panel
- History for selections and quick mask
- History for layer properties
- Xpm file format can be associated to IcoFX
- Explorer panel supports vertical/horizontal layout depending on size
# Fixed
- The Explorer panel opened slowly folders that contained large zip fies containing many compressed files
- Crashed sometimes if copy was pressed in quick mask mode
- Minor enhancements and bugfixes