Generalize script send-translations (#1452)
Generalize script send-translations (#1452)

* Generalize script send-translations

Clean up script send-translations so that it's much easier to
use and more generalized. This way, we can easily update our
translations directly from the YAML files whenver that's convenient.

This includes various tweaks: Send error messages to STDERR,
and use uppercase for the name $CURRENT_TRANSLATIONS.
Ruby's sigil already makes it clear that this is uppercase,
but by also using uppercase names for global variables we
make the distinction *extremely* clear.

Signed-off-by: David A. Wheeler <9ae72d22d8b894b865a7a496af4fab6320e6abb2@dwheeler.com>
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