Merge pull request #15 from camertron/day_period_variants

Upgrade to CLDR 23 + day period variants
Fixing plural fallbacks
Fixed problem where the plural hash was being exported with the incorrect locale (if there was an available fallback)
Merge pull request #16 from camertron/fix_pural_fallbacks

Fix Pural Fallback Behavior
Put quotes around plural symbols so that locales like en-GB work as expected
Merge pull request #17 from camertron/quote_plural_symbols

Put quotes around plural symbols so that locales like en-GB work as expected