Introduce the hybrid_post_class_filter() to run over the WP post_class filter hook.  We can now use get_post_class() whenever we need to get the post classes.  Clean up context.php a bit.  Still more to come.
Deprecate hybrid_get_body_class() in favor of a filter on WordPress body_class hook.
Deprecated hybrid_get_comment_class() in favor of a filter on the WordPress comment_class hook.
Move deprecated body, post, and comment class functions to deprecated.php.
Move the deprecated hybrid_avatar() to deprecated.php.
Move deprecated hybrid_footer_content() to deprecated.php.
Rename comments.php to template-comments.php.
Rename general.php to template-general.php.
Split media.php into media.php and template-media.php.
Split post-formats.php into post-formats.php and template-post.php.
Move functions to appropriate template-*.php files.
Move hybrid_locate_theme_file() to utility.php, drop wish-list.php, and load utility.php earlier.
Introduce the Hybrid_Media_Meta class for handling attachment/media metadata in themes.
Adds a few common template functions for working with media from my themes.