Release 3.0

This is a major release with an updated interface and several improvements. This is the list of changes:
- improved software interface
- improved software performance
- improved software source code
- improved support to Delete action in 3 modes
- added several internal environment variables
- added support to additional filters (based on size and date)
- added support to full paths as rules
- added support to Rename action
- added support to schedule folder scanning
- added support to wait closing of opened files
- fixed minor bugs