Updating files to version 2012120401

See Changelog.txt for details
Updating files to version 2012120403

See Changelog.txt for details
commenting Moodle.org plugin check requirements
Updated to version 2012120404
Updating to 2012120407
Update to 2012120408 - Added support for Moodle 2.5
Refresh individual inbox row now fetches Translated Matching similarity
Fixed issue where deleted parts were being flagged as duplicates after course reset
Added support for backing up / restoring activity logs
Added support for .wpd and .ps file types
Warning that grades will be overwritten now correctly disables after due date rather than post date
Fixed issue where user's were not able to resubmit for the option 'Generate reports on due date'
Fixed issue with Student data privacy auto generated last name
Fixed issue where submission modified dates
Fixed issue in database delete call when updating inbox and purging old records
Fixed issue where updating individual row set the submitted date to now()
Removing the Moodle 2.0+ check, still supporting 1.9+ in one build
Merging v2012120401 from master
Merging v2012120403 from master
Merge v2012120404 from master
Merging v2012120407 from master
Merge v2012120408 from master