Support for Syndetics

Similar to how the Amazon enhanced content is supported, the enhanced content provided by Syndetics should also be supported.

The following information is still needed in order to complete this RFC.

• What system preferences would need to be added to support Syndetics? (Ex. SyndeticsURL, SyndeticsAccessKey)
• What enhanced content does syndetics support? (Ex. cover art, reviews, summaries)
• What field would be used to match each item? (Ex. isbn, upc)