Improved previously introduced check

Dynasty head's House now should get preferential treatment when deciding which house should children of his marriage belong to

Now - If one parent of the children of character you are granting the cadet house to is of the former house, than those children will stay of the main house.
(Family trees are hard, and I barely understand what I wrote here myself)

Now you can grant cadet houses to dynasty members without land

Lifted some unnecessary requirements

- implemented AGOT compatibility