Out of the box bindings are now fully working: the adg-demo
program provided by adg-lua (http://adg.entidi.com/lua/) is
in par with the official adg-demo in C.
AdgDress is inherited from GEnum instead of being a handcrafted
solution. A lot of specialized code have been removed, so the
mapping between numbers and names in bindings is automatic.
Consistency in widget names has been improved, allowing to
simplify signal connections on the Lua side.