Target spec version 0.13
Corresponding fix for jgm/Commonmark#209
Fix list item formatting to match spec
Update README
Merge pull request #16 from thephpleague/spec-0.13

Spec 0.13
Prepare for 0.4.0 release
Update broken references to stmd.js (fixes #17)
Un-bold the previous version
league/commonmark not commonmark-php