Release 2.5

This is a major release with an updated interface and other minor improvements. This is the list of changes:
- improved message shown in case of duplicates
- improved software interface
- improved software performance
- added %DefaultProgram% environment variable (only for Open With)
- added %ParentDir% environment variable (relative to each file)
- added Destination column in Manage Patterns window
- added icons to GUI menu and Tray menu
- added resize support for Patterns and Profiles windows
- added some profile examples (Archiver, Eraser, Extractor)
- fixed progress bar during compression/extraction
- fixed minor bugs