Fixing validation of email and role in memberships
Merge pull request #164 from taigaio/bug/1650/error-validating-email-and-role-in-memberships

Fixing validation of email and role in memberships
Adding history entries to sample data
Merge pull request #165 from taigaio/adding-history-entries-to-sample-data-command

Adding history entries to sample data
Adding member stats to the API
Adding leave project API
Add db_index to key field in history_entry
Refactoring owner permissions, now only is_owner memberships are considered as owner users