adding very basic permutation directory to lmfdb
Merged to upstream.
Merge branch 'master' of git://github.com/LMFDB/lmfdb
Merge branch 'master' of git://github.com/LMFDB/lmfdb
improved permutations security issue, URL and error page on bad input
Merge pull request #9 from seblabbe/master

Permutations in LMFDB