#496468 by c4rl. allow admins to specify maximum audience per content type. can disable crossposting by setting this to 1.

#216812 by alex_b and moshe weitzman. move access control to a new og_access module. this feature isn not quite finished. please wait until my next commit and then help test this major change.

#107289 don't deny access to nodes without any groups. patch by beginner and myself. there is an update required but the update does not change your schema. i do recommend backing up DB beforehand. Please report back any successes or failures with this new code.