plupload 7.x-1.0-beta4

- #1230632 by ksenzee: Hard-coded file size limits.
- #1219992 by slashrsm, axe312, Dave Reid: Add support for Drupal native translations.
- #1111054 by George Petsagourakis: Convert plupload_fix_temporary_filename() a private function
- #1316438 by jcfiala, slashrsm: Plupload in AJAX call causes form.submit handler to be added multiple times
- #1300620 by jamiecuthill, ksenzee: Update to 1.5.1.1 because uploading is broken in Firefox 7
- #1121070 by Moloc: Warning: unlink(...) [function.unlink]: Permission denied in plupload_handle_uploads()
- #1348892 by slashrsm, Moloc: Show library version in status report
- #1267190 by Moloc: Plupload transliteration support for d7
- #1240654 by Dave Reid: Use a proper namespace for file_uri_to_object().