Milestone 2.1.0

This is a production release of eduCommons that includes the following features:

• Better Support for IMS Content Packaging, including eduCommons extensions
• Import/Export? of eduCommons content - allows content to move from one eduCommons instance to another
• Migration from the last production version of eduCommons (1.5.2)
• Content objects exposing embedded Dublin Core Metadata in RDF
• RSS feed on course list - allows users to track the publishing of new courses
• Content license chooser
• Separating eduCommons functionality into Plone products (ZipTransport, ObjectTransport, !IMSTransport, ContentLicense)
• Support for Plone 2.5
• Refactored IMS Content Package engine with new IMS Content Package metdata format