craigbarnes/lua-gumbo — pull request #13 by istr (2014-11-19 09:49:59+00:00)
Title: implemented Node:insertBefore

Read CONTRIBUTING.md, fiddled about with git (usually I use http://fossil-scm.org), rebased into single commit.
Note that setting ```ownerDocument = self``` in ```Document:create...``` is vital for appendChild to work properly, too. But I did not want to split out that minor tweak to a separate branch.