8952eda98d0953c210eb159f24fd0ddce26cfb81
The parent trees are built on a per-course basis (so it'll throw ItemNotFoundError if an item exists in a different course from the one you're asking after. NoPathToItem can still happen with MongoDB backed courseware. They store things like the info page as HTML snippets which are orphaned from other content.
version is required http://gembundler.com/man/gemfile.5.html, this was causing rvm to return non-zero and thus causing the create-dev-env.sh script to fail
See doc/ for documentation.
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