Add footnote rules
Removed hard dependencies in benchmarks, use devDeps
Add definition lists
Updated autolinker dependency
Footnotes: updated docs & defaults
Moved html escape helper to utils
Moved coveralls to devDeps
Demo: abbr & footnotes example
Demo: updated sample headers
Exposed helpers to simplify custom renderers
npm package info update
Added  extension to renderer
Fix text after inline footnotes
Deduplicate footnotes
Updated footnotes layout/styles
Added deflist sample
Fixed footnotes test
More safe properties check
Browser files rebuild
1.4.2 released