media_mover 6.x-1.0-beta4

Changes since DRUPAL-6--1-0-BETA3:

• #440886 laken, arthurf: Changes how the S3 perms are handled, should work better for managing these. Adds mime type support for putting files on amazon
• Whitespace cleanup for #345022
• MM CCK: correctly replaces files from cck field
  MM CCK: adds option to delete source material