Rename 'lookup' to 'lookupSection'.
Implement 'lookup' and 'lookupAuth' in terms of 'lookupSection'.
Update the docs for 'lookupSection'.
Export 'lookupAuth' from Network.DNS.Resolver.
Rename 'lookupNS' to 'lookupNSImpl'.
Implement 'lookupNS' and 'lookupNSAuth' in terms of 'lookupNSImpl'.
Export 'lookupNSAuth' from Network.DNS.Lookup.
Add an hSpec test for 'lookupNSAuth'.
Merge pull request #10 from mjorlitzky/auth_lookups

Auth lookups