changed to only fork a thread if number of rows in spreadsheet is > 500 (so small spreadsheets don't have to wait for status page's first update if<5 seconds)
LDEV-1261 improve import user speed by running in separate thread (bypass hibernate filter), and update browser with progress every 5 seconds so it doesn't timeout.
LDEV-1098: Increased size of locale_id field so that it will take more than 127 rows in the database. Matching java field is now an Integer, not a Byte.
change 'course admin/manager' in db to 'group admin/manager' so users don't have to say 'course admin/manager' when specifying roles in a spreadsheet ('course' replaced by 'group').