Add html5shiv to vendor.yml
Extend vendor test for html5shiv
Handle minified html5shiv
Merge pull request #1190 from Madsn/patch-1

Add html5shiv to vendor.yml
Add a multitude of Forth file extensions.
Yes, these are all in use.
Add Groff sample.
Update samples.json.
Make test_pedantic accept quotes around extensions.