Query Filepath for owner and group ID or name

[jacobsin]

I have searched the os, ospath, and plenty of other libraries in the STDLIB and 
can't find a way to query for the user and group id of a file. I can get the 
FilePermission and FileInfo but neither contain the owner or group ID. I would 
prefer the method be as cross platform as possible but if it only works for 
Unix systems thats fine.