Remove plugins I don't use. Also, made a change to the Towny checks.

If we're not using an external permission plugin, then let's just check
the player for explict permission.

I do realize that I shouldn't have removed the other plugins, but I
don't use them and the changes which are going to take place in this
version are strictly for my server and I highly doubt they'll fit anyone
else's servers usage so I will recommend against people using this
version.