Parser doesn't extract proper links from Atom-Feeds (from FeedBurner/BlogSpot)

Hi,

I'm using Aggregator Summary on a customer's site. The customer has been using blogspot.com and wanted to integrate feed blocks into its new site. However, Aggregator Summary failed to extract proper links to feed items due to structure of feed code (entry-tag containing content-tag and link-tag being sibling to each other, appearing in that order). Due to limited use of $element in aggregator_summary_parse_feed() and related callbacks $element was set 'ITEM' at start of entry, but dropped at end of contained content-tag. So I had to add a stack of $element-values to fix this limitation.

Find attached a patch for current release.

Best Regards!