Made threading of authentication on the database an option, via -t or --threading. Expect most people to want to use that option.
Merge branch 'master' of github.com:pdehaye/lmfdb into auth
Merge pull request #15 from pdehaye/master

optional threading for authentication; fixes threading issue like a miracle, too.
Merge branch 'master' of git://github.com/LMFDB/lmfdb