Mistake in l10n README file
Merge pull request #1080 from webplatform/master

Mistake in l10n README file
Adding explainations on how to work with i10n
Fixing markdown mistake
chore(l10n): add email marketing strings

Fixes #1042.
Merge pull request #1089 from mozilla/issue-1042-email-marketing-strings

chore(l10n): add email marketing strings
Merge pull request #1084 from webplatform/master

Improved i10n documentation
feature(build): Pre-build static pages and CSS for each locale.

* Generate copies of static pages for each locale. Replace links to localized resources (like CSS) with their prebuilt equivalent.
* Generate one CSS bundle per locale. The CSS bundle will contain the correct fonts for the locale.
* Serve up the css files based on the user's language.

Tangential changes:
* Alphabetize the dependencies.
Update shrinkwrap for grunt-connect-fonts, connect-fonts-firasans and connect-fonts-clearsans