Added Translation? column to the approval billing reports.

Changed row data so we use booleans for boolean columns.  The CSV
writer can handle those fine.
Renamed billing record types and removed the old type

In the UI we now call them "Crowd sourced" and "Professional
services".  In the backend we call them TYPE_BILLING_RECORD and
TYPE_APPROVAL.

Fixed a bug with the TYPE_BILLING_RECORD reports, were we weren't
generating minutes correctly.
Added billing type to pay users who perform subtitling/review work