travis: basic testing of l10n guide
travis: don't warn as error just yet

For now catch real errors.  Once warnings have been eliminated we can
enable warnings as errors.
travis: build strictly with warnings as errors

Lets catch brokeness early.
mozilla: just drop deprecated section
docs: drop Mozilla CVS doc
Update languagenames.rst

Romanian
Update languagenames.rst
Fix csb rule.
Add Assamese and Angika
Add examples to brand name in German

Examples for brand name in German were not provided, so I added some.
Update languagenames.rst

Added Greenlandic (Kalaallisut) and Danish (Dansk)
Add Greenlandic plural form