For bug 869495 - changing 'release notes' to 'version notes'

New URL, a few content changes, removing devices.
Merge pull request #1023 from craigcook/bug-869495-fxos-version-notes
Fix bug 881754: Move firefox/new to bedrock for several locales.

Also related to bug 883127.
Merge pull request #971 from pmclanahan/firefox-new-add-locales-bug-881754