don't pull heading labels in compatibility mode
Merge branch 'master' of github.com:fletcher/MultiMarkdown-4
update README re: test failures
include 'autolabels' inside div's to allow internal links to work
Merge branch 'master' of github.com:fletcher/MultiMarkdown-4
use unsigned long for extensions (increases available number of options); add option to generate random anchors for footnotes in HTML
finish swapping int to unsigned long for extensions
Merge branch 'master' of https://github.com/fletcher/MultiMarkdown-4