new tools
- look at mandriva code : urpmi_rpm-find-leaves
- add new tool to find "external" rpm (not in repository), look at :
	foreign_rpm.pl (mandriva)
	yum list extra (fedora)

graphical interface
- display more informations (summary, version, install time ? )
- search tool
- add command line options as menus ?
- clean display when delete rpm ?

1.8
- translation
