Optimistic Concurrency Control first approach
Updating current version in presave instead of doing it in the post_save method
Avoiding race conditions in pre_save
Fixing tests
Merge pull request #49 from taigaio/concurrency-control

Optimistic Concurrency Control first approach
Adding archived user stories feature and enabling API filtering
Merge pull request #50 from taigaio/archived-us

Adding archived user stories feature and enabling API filtering
Implement tags using pg arrays
tags to pg array migrations
Re-applying migration in conflict