Fix bug 912101 - version notes for Firefox OS 1.1

This also renames the templates in a more future-friendly naming scheme, though hopefully future automated publishing will replace this anyway.

I'll be out of office Thursday and release engineering wants to get this live as soon as possible, so I'm closing PR #1337 and opening this one from the equivalent branch in the moz repo instead of from my own fork, so someone else can make edits without me if needed.

Preeti Raghunath is the releng point of contact for content questions (preeti on IRC).