3.5.1

Remove a broken bracket in the blog template. #181
Fix transliteration of strings into URL slugs to still transliterate when it can but not smash multibyte chars. #183
Only match source URI templates if the date components match what a date would look like, and avoid throwing when companion files do not have an article. #184
Re-support spaces in blog article source paths. #185

3.5.0

Add support for internationalization and locale-specific articles. #156
Drop support for Ruby 1.8 and Middleman 3.0.
Removed backwards compatibility patch that set instance variables for tag and calendar pages. Use locals instead.
Templated paths like :sources, :taglink, :year_link, :month_link, :day_link, :page_link, and custom_collections links can now be optionally expressed as RFC 6570 URI templates.
Arbitrary data from page frontmatter can be used in the :permalink template. Simply add a key to your :permalink template that matches a field from your frontmatter.
Data extracted from the :sources URL template can be used in the :permalink template. This information can also be used from templates via current_article.metadata[:page][].
UTF-8 strings substituted into URLs are now preserved rather than being omitted. #176
"middleman article" command now works even when there are multiple blogs. Specify the blog you want using "--blog".
The template used to generate new articles via "middleman article" can be overridden by setting :new_article_template.
Removed :blog_name, :blog_author, :blog_avatar options and the page_title helper.

Add inspect methods to BlogData and BlogArticle to avoid hangs on exceptions. #157
Generated feed.xml now works on blogs with no posts. #155
No longer depend on middleman-more.
Don't try to replace tokens that don't exist in the source path. #161
Support for including arbitrary frontmatter data in blog permalinks. #164
When using multiblog, fail immediately if the blog name isn't specified. #168

Experimental support for multiple blogs in a single site by activating :blog multiple times.
Works as a Middleman 3.1-style extension.
Add :blog_name, :blog_author, :blog_avatar options and a page_title helper that incorporates :blog_name.
Allow options.sources to contain the same date component multiple times. #112
Improve feed.xml.builder template to support blog.prefix. #126
Hide page numbers in template if only one page per index. #125
URLs in the feed.xml template are now absolute. #130
ASCII-8BIT text is reencoded to UTF-8 to avoid Nokogiri problems when generating summaries.
summary will no longer explode when encountering comments in the article. #136
Fix setting time zone with set :time_zone in config.rb. #140
Articles can omit their :title from the filename and specify it in frontmatter instead. #148
Pages can choose which blog to use in multi-blog mode by specifying the correct blog in frontmatter. #150

The summary method on articles is now HTML-aware, and can be provided with a different summary length or ellipsis string: summary(1000, '…'). Nokogiri is required to use the summary.
The summary_generator option now recieves the rendered article (without layout) instead of the template source.
Set summary_length to false to always use the full article as a summary.
Future-dated articles can still be generated if publish_future_dated is true.
The summary_separator option no longer needs to have a capturing group, or even be a regexp.

Don't publish future-dated articles. #74
Create summary from source instead of output. #70
Deprecate instance variables in templates in favor of locals. #66
Allow articles to set "published: false" in frontmatter and show up in preview but not in build/production.
Allow articles to have their own layout set in the YAML front matter. #59
Per-article content subdirectories. #60
Allow article date to be in any order in permalink. #60
Use link_to in blog templates. #62
Pagination for index, tag, and calendar pages. #57