#2 add object relations

[p.kerspe]

add a function to allow creation of table relations. e.g. to allow 1 to 1 and 1 to any or any to any relations of objects.
The user interface should allow to specify databasetable primary key fields in table A to be directly linked to a field in table B (1 to 1 link) or to specify a link table which links primary key from Table A to primary key of table B (1 to any or any to any relations)

[p.kerspe]

will be available in next version (1.1)