Bug 939595 - lightbeam/about: make navigation menu localizable

Wrap strings like in other pages
Bug 925278: add new locales to firefox/channel redirect

Added locales: fy-NL, pl, uk
Bug 935877 - Enable VTCS and Lightbeam for more locales

Added locales:
* VTCS: es-AR, fr, fy-NL, mk, pl, sq, uk
* Lightbeam+Webmaker: cs, cy, fy-NL, pl, uk
Merge pull request #1408 from flodolo/bug939595

Bug 939595 - lightbeam/about: make navigation menu localizable
Fix bug 924347: Fall back to en-US download locale.

If no localized Fx build exists for the latest version
fall back to an en-US download link.
Merge pull request #1406 from flodolo/more_locale_home

Bug 935877 - Enable VTCS and Lightbeam for more locales
Merge pull request #1407 from flodolo/channel_locales

Bug 925278: add new locales to firefox/channel redirect
Merge pull request #1410 from pmclanahan/fx-download-broken-link-no-build-924347

Fix bug 924347: Fall back to en-US download locale.