Fixed issue #22.
Started post for v0.4 and shortened releases list in front page.
Dropping h1 from post html txt in atom feeds (fixed issue #21).)
Added documentation for drop_h1 option.
Added the option to Catalog to yield posts in reverse order (fix #19).
Made Collection.relsize a function, fixed relsize issue #2.
Updated upcoming release notes.
Completed issue #20.
Some reorganization in the code and templates:

 - Moved feed generation to a separate function
 - Using different templates for catalogs and collections.
Cleaned up templates.
Fixed template issue.
optimizes repetative sorting
Merge pull request #25 from tychoish/optimization/list-sorting

optimizes repetative sorting
Revised logical comparison.
Added new configuration options (see issue #24).

blog_archive_titles = False # set True to see only titles in archives
blog_feed_titles = False    # set True to exclude excerpts from feeds
blog_feed_length = None     # specify number of recent posts in feeds
Merge branch 'devel' of github.com:abakan/ablog into devel
Fixed issue in logical comparison for sorting.
Fixed `post_auto_image` and `post_auto_excerpt` options.
Revised `post_auto_image` handling and documentation.
Commented out print statement.