Bug 766606 - [mozilla.org] Firefox download button doesn't block new unsupported operating systems

* Copied the old platform detection code from download.js
* Added Windows 2000 (NT 5.0 and 5.0.1) detection
* Added Windows XP SP1 detection
Bug 870776: Don't escape locale names from product-details in templates
Bug 892470 - enable plugincheck for ml, ro
[bug 898024 898025] enable get phone cta for Venezuela and Columbia
Bug 799273 - [ro] Get Involved page, fix responsive design all locales

* Add email address
* Add 'ro' to LOCALES_WITH_MOZ15
* Add localized banner + css rule
* Fix CSS for slides 2 and 6
* Fix all localized rules (added .on class to be active only on the slideshow)
Bug 897195: Port /newsletter/confirm to Bedrock
Merge pull request #1117 from alexgibson/enable-get-phone-cta-co-ve-firefox-os

[bug 898024 898025] enable get phone cta for Venezuela and Columbia
Merge pull request #1124 from gauthierm/bug-900171-videojs-chrome

Include protocol in video sources for Chrome.
Merge pull request #1103 from dpoirier/bug-897195-port-confirm

Bug 897195: Port /newsletter/confirm to Bedrock
Merge pull request #1112 from flodolo/bug799273_ro

Bug 799273 - Get Involved [ro], fix responsive design
Merge pull request #1109 from flodolo/bug892470_mlro

Bug 892470 - enable plugincheck for ml, ro
Fix bug 898447 - link to news post about Telefonica/Colombia/Venezuela
Merge pull request #1128 from craigcook/bug-898447-update-homepage-news

Fix bug 898447 - link to news post about Telefonica/Colombia/Venezuela
Bug 899837 - Always display thanks on /updated page

Always display "Thank you for updating your email preferences"
at the top of the /newsletter/updated/ page.
Bug 900081 Update DNT Page to include W3C Links
Bug 900493 update home page redirect to allow its localization
Bug 873087 - Generalized lang file tags

Support for lines like '## tag ##' in lang files, where tag can be any string.
For efficiency, tag lines must be the first lines in the file.
Merge pull request #1126 from dpoirier/bug-873087-lang-file-tags

Bug 873087 - Generalized lang file tags
Bug 826323 - Don't HTML-escape the text in contribute emails
Bug 705416 - Port Firefox Release Notes index page to Bedrock and automate the update