Sorting is working for all the column except status.
Add sorting on print status. Move print status logic into controller.
Sort last print timestamp in descending order.
Add print status after print.
Add sorting on public print status page.
Defined sorting code outside of location query.
Move print status logic to common PrintStatus service.
Merge pull request #26 from NUBIC/issue_20_sortable_columns

Issue 20 sortable columns