User ids may be big integers
Interpolate d3js chart
Hide 'created by' if empty
Fixing start login url
Don't check for first user but for first admin user instead
Sort projects by. Creation date may be falsy after v1 migration.
Performance improvements for home page
accepted_licenses relationship needs to be lazy joined loaded
Don't use transaction to unlock tasks. Use the same session.
Fail safely if there's no author for a comment (V1 migration).
Flake8
tell alembic to create a version table when creating the tables
Merge pull request #161 from hotosm/prepare_for_v1_migration

Prepare for v1 migration
Fixing issue with filtering tasks candidate for expiration.
Adding columns and relationship to model for tasks assign
Adding view for assigning tasks. With tests.
Show list of assigned task in empty template
Assignee. With interface cosmetics.
Close task button works again
Adding missing template for assignee