Updated announcement RSS <link> item to <permalink>
Removed duplicate announcement rss output items; updated item names to camelcase
Fixed closing permalink tag
Updated all announcement property names to use camelcase
Better rss-friendly announcement feed
New announcements are now sorted in ASC order; not new posts appear in DESC order
Updated new announcement sorting to maintain key associations
Prevent nonexistent dates from printing in publish date field for announcement rows
Grouped announcements into ongoing and non-ongoing; moved semester constants to config.php; moved announcement output function to functions.php
Updated ongoing announcement header styles