Merge pull request #1 from MarcosFino/master

Bug with slugify-uniquely when updating an entity from a proposal and changing the name
Add change_domain_instance command
Bugfix
Remove obsolete settings
Add sendmail email backend
Add reply-to to mails sent from macadjan
Add link to existing entity in proposal page in admin
Add backup scripts
Rename sites.txt
Ignore local sites.txt
Add more ignores and backups directory
add management script
Update management scripts
Fix mini bug
Improve error reporting in importer
Add two spanish docs
Show province in parenthesis
Add help text