Inflector rules (singularization and pluralization) for Spanish

[davidcelis]

Hey, guys. Thought Spanish speakers who follow this board may appreciate that I've added Spanish inflector rules in my inflections gem: https://github.com/davidcelis/inflections

I'm fairly well versed in Spanish, but I'm not a native speaker. If anybody notices errors or missing rules, please submit a pull request and help out.

Likewise, if you speak another language, it'd be awesome to get some more inflection lists into the gem for other foreign languages.