Fix some relative paths.

The robots.txt and favicon.ico locations were specified as relative
paths, which should have been changed since the location of the start
script changed relative to everything else. Hopefully, these paths are
specified correctly now and shouldn't need to be fixed in the future.
adding very basic permutation directory to lmfdb
Merged to upstream.
Merge branch 'master' of github.com:LMFDB/lmfdb
Remove report of search query for Hilbert modular forms.
Merge branch 'master' of https://github.com/LMFDB/lmfdb
Added "All twists" to friend list of elliptic curve home page
Added j-invariants to data imported from raw data files
Merge branch 'master' of git://github.com/LMFDB/lmfdb
Merge branch 'master' of github.com:LMFDB/lmfdb
Fixed import line.
Merge branch 'master' of https://github.com/JohnCremona/lmfdb
knowls: set Access-Control-Allow-Origin=*
Merge branch 'master' of github.com:LMFDB/lmfdb
Merge branch 'master' of git://github.com/lemurell/lmfdb
knowls: raw rendered ones are nothing special any more …
Merge branch 'master' of git://github.com/LMFDB/lmfdb
Implement factoring of Dedekind zeta functions.
Merge branch 'master' of https://github.com/LMFDB/lmfdb
Fix styling of table of Artin representations on number field home pages.