fix
improved the mac address generation.
Infact there are some addresses are not allowed
http://www.iana.org/assignments/ieee-802-numbers/ieee-802-numbers.xhtml
which i not respected causes problems on booting some machines
added to tags that i could join tags to object_ids and query
them back. With this i could add tags to the drawing so that
you could see what tags are bound to some ipaddresses
Merge branch 'master' of https://github.com/mabels/construct
new regexp step added and wait for prompt refactored