Fixing nametag permissions removing unnecessary code

Stop ops getting perms for all prefixes
Allow stackable permissions e.g.
if you have multiple prefixes and
suffixes you will get the last one
applied to you
(this might mean telling people to flip their configs)
Since it reads from top to bottom and overwrites as it goes, so the
perms at the bottom overwrite the top
Merge pull request #7 from sanjay900/master

Fixing nametag permissions removing unnecessary code