Replace hexagonit.recipe.download with a combination of buildout's download infrastructure and a standalone archive extractor.
Improving comment
Change the condition on the test for using the cache so it's more resiliant to API changes if it is actually a bug.
Argh the comments still didn't make sense, fixing properly
Merge pull request #14 from evilbungle/master

Fixing extraction issues with new setuptools/buildout (probably fixes #12)