Update dependencies
Replace Express with Connect
Add fragment_cache helper. Add cache option for partial helper.
Added rel="next/prev" for links in paginator
Merge pull request #638 from arkasha69/fix/rel

Added rel="next/prev" for links in paginator
util.yfm: fix parsing bug with inline separator #636
post.create: wrap title with quotations #636
Merge branch 'hotfix/front-matter' into dev
Merge branch 'hotfix/front-matter'
fix auto_spacing filter: use pangunode instead. Fix #631
https://github.com/huei90/pangu.node
open_graph helper: allow multiple images
Update dependencies
Refactor external_link filter with cheerio
Escape slugs for tags and categories, honor filename_case setting.
Fix util.escape.filename which used to change filename to lowercase forcibly
Merge pull request #644 from vlevit/hotfix/escape-slug

Escape slugs for tags and categories, honor filename_case setting
Merge branch 'feature/connect-3x' into dev

Conflicts:
	package.json
Add helpers: image_tag, favicon_tag, feed_tag
Update helpers: link_to, mail_to
Update tests
server: decodeURIComponent