Another localization

[dizer]

Based on #113 from @luan

[davispuh]

Note that I've started quite big changes in #278 and basically this will have to be rewritten once that is finished. For example prenormalize regexp's are completely removed. Also it's somewhat pointless to use Numerizer for other locales as currently it supports only English. So firstly should add locale support to Numerizer.
Another thing I'm not sure if it's good idea to put translations directly in Ruby. I think better would be to use CLDR translations and add misspellings (which are not in CLDR) in separate locale files. All translations could be stored in yaml files and loaded at runtime based on used locale. Also there could be different date/time definitions based on locale.