Added INFANT
Added PET and BABY (likely never needed)
Updated README for new TS4 version
Imports cleaned up
Players who dress the INFANTS, PET and BABY sim objects a lot may want to update.
There is no real need to update, these sim objects are also supported in the previous releases as 'other'. So these 3 types are mixed into one but as they are rarely used it should be no problem.