Merge branch 'release/0.4.6' into develop
Add source column
Upgrade script to add columns.
Upgrade script to fill in old source data.
Use the version of the currently installed datanommer.models for the source_version column.
Merge pull request #50 from fedora-infra/feature/source-column

Feature/source column
grep: Permit rows_per_page=None to not limit rows
Merge pull request #51 from fedora-infra/feature/infinity-and-beyond

grep: Permit rows_per_page=None to not limit rows
0.5.0
Merge branch 'release/0.5.0'