Some proposed changes.

Added guid element to item elements. Used macro for date conversion. Updated channel/link element to be main URL instead of link to RSS feed. Added channel tags for description, language, generator, and webMaster.
Adding Ryan suggested changes.

Moved item output into macro to eliminate whitespace. Trimming item and date outputs. Moved xpath filter into variable to make it easier to customize.
Switched from last-mod to start-date for items.
Merge pull request #4 from hannonhill/minor-updates

Some proposed changes to Basic RSS Feed.