item_egg field update

and minor change to unit relations
Merge branch 'master' of git://github.com/KurikAmudnil/df-structures
Add cross-reference links to the egg item definition.
Add info from Urist Da Vinci, plus a curse-related struct used by wound.

http://www.bay12forums.com/smf/index.php?topic=91166.msg4435715#msg4435715
Update CSV
This field is 32-bit and looks more like flags than a bool.
Fields involved in operation of beehive buildings.
Update CSV
Add missing OSX offsets.
viewscreen_setupadventurest