[TYPO3-mvc] FeUser / FeUserGroup

[Steffen Kamper]

Hi,

i started to use fe_user in extension, and i know the status of 
integration is not finished.
What i found is:

* FrontendUserGroupRepository is missing
* FrontendUserGroup miss property $subgroup of type 
Tx_Extbase_Domain_Model_FrontendUserGroup
* FrontendUser miss property FrontendUserGroup

where can i find the logic converting CSL to relation? Didn't found it 
in code.

And a general remark for system tables:
as these tables may be extended by other extensions, does be need some 
magic for this properties and getters/setters?

vg Steffen