+ improved README
+ documented .disabled method.
+ corrected VROOTDIR default value.
+ added ninjahelper to the install instructions.
+ improved rdiff, dup and sys handlers' vservers support
+ prevent vserver-debiantools' $VROOTDIR/ARCHIVES directory
+ to be seen as a vserver
+ changes to sys handler
+ make use of configurable $VSERVERINFO instead of hard-coded vserver-info.
+ fixed dpkg existence test inside vserver.
+ fixed $nodpkg use.