[WIP] remove thumbnail_url
Merge pull request #131 from seuros/master

[WIP] remove thumbnail_url
Update contributing file
Merge pull request #132 from alxers/update_contributing_file

Update contributing file
[WIP]Add columns to pgteams
[Fix] Skip analyse spam in dev
Annotate models
[DONE][127] retry to feature protip if private url is unavailable.