feat: create/delete seda object group for each binary and physical object
The object are not shown on the archive itself but on the group instead.
fix #13
Group are listed in the profile :
However, there is no way to create object group directly. The group is created automatically for each binary/physical object.
Even if the binary object is not directly linked to the archive, it is now display in the tab:
On a group, the binary is also displayed:
--HG-- branch : seda21