[Translators] Updated Spanish (es) translation

[pico.dev at gmail.com]

Hi!

I updated the spanish translation and the file for the windows installer
located in extras/package/win32/languages. You can get both files from
here

http://docs.google.com/uc?id=0B4yquUFv3csrNmQwNzRmZTEtMDA2My00YzQzLWIxMGItZjlmNzk5YzdjYzgw&export=download&hl=es

Please commit. Also if it is possible update the translation maintainers
page [1] with my name (David González) and email (pico.dev at gmail.com)
and remove Antonio Javier Varela.

Thanks,
pico.dev

[1] http://www.videolan.org/developers/i18n/