Upgrade KumaScript: PRs 220, 236 - 239
Upgrade KumaScript: PRs 220, 236 - 239

- mozilla/kumascript#220 - Update some specification names and URLs
- mozilla/kumascript#236 - bug 1380045: Update link to Editor's Guide
- mozilla/kumascript#237 - bug 1381033: Remove Promote-MDN.txt
- mozilla/kumascript#238 - example add-ons -> example extensions
- mozilla/kumascript#239 - Add macro specific to interactive examples

jwhitlock/kuma,SphinxKnight/kuma,SphinxKnight/kuma,Elchi3/kuma,SphinxKnight/kuma,a2sheppy/kuma,escattone/kuma,Elchi3/kuma,jwhitlock/kuma,a2sheppy/kuma,mozilla/kuma,escattone/kuma,jwhitlock/kuma,mozilla/kuma,mozilla/kuma,jwhitlock/kuma,Elchi3/kuma,a2sheppy/kuma,jwhitlock/kuma,Elchi3/kuma,a2sheppy/kuma,SphinxKnight/kuma,mozilla/kuma,escattone/kuma,mozilla/kuma,SphinxKnight/kuma,Elchi3/kuma,SphinxKnight/kuma,a2sheppy/kuma