- formatters are passing raw values to view and then to preprocess functions
- moved core formatters into separate file views_rss_core.field.inc
- added new field handler/RSS field formatter for "All taxonomy terms"
- added new generic field handler working with raw values received from formatters
- views_rss_core_preprocess_category() no longer used for feed items
- renamed views_rss_core_preprocess_category() to views_rss_core_preprocess_channel_category()
- views-view-views-rss-field.tpl.php modified to handle $markup variable
- updated view field settings forms
- updated function docs

- removed all theme function
- slightly reorganized element configuration arrays and default configurations
- added new template file views-view-views-rss-field.tpl.php for single feed element
- added Views RSS module build version checking
- other cosmetic changes

Added 4 new hooks and modified old ones, added data caching, added install files, changed view options array structure, moved files and functions around, fixed #1426930, docs, code cleaning

Added "RSS email: with user name" format for email fields, fixed empty <guid> element showing even if not defined

Initial version of 6.x-2.x branch, during a major rewrite. Definitely not finished yet, most of the main features should already work fine though.