Make name sortable for projects (fixes #40)
Allow no IFC sector etc on projects.
Added search facility on Projects
Added project reverse to_date ordering for CVProjects (fixes #101)
Added from_date and to_date to CVProject
Added from_date and to_date to CVProject model (requires 'django migrate cvs') (fixes #100)
Ordered categorizations first by parent name then by sub name for clarity (fixes #102)
This addresses the specific admin inputtext width problem mentioned in #41.