djeuscan: rework the scan process, don't use alive anymore

Signed-off-by: Corentin Chary <corentin.chary@gmail.com>
djeuscan: add lost migrations

Signed-off-by: Corentin Chary <corentin.chary@gmail.com>
Merge branch 'master' of https://github.com/iksaif/euscan
euscanwww: PEP8 fixes

Signed-off-by: volpino <fox91@anche.no>
euscanwww: Added category description, overlay description, homepage and path

Minor changes:
- Fixed broken tests (alive field was still there)
- Added plural to Category model

Signed-off-by: volpino <fox91@anche.no>