Add various usergroup test bb-codes which only render content if the user matches. While imported, these bb-codes are not enabled by default
These bb-codes are recreations for the old User Group BB Codes by Waindigo (or later [TH] User Group BB Codes for XenForo 1.x
Implemented bb-code:
guest
registered
isuserid
isnotuserid
ismemberofusergroup
isnotmemberofusergroup
Note; the guest/registered bb-code are implemented differently from the older Waindigo versions. This add-on's implementation test actual 'is guest' vs 'is registered user' compared to hard-coded user-group tests
