174 clean up i118 locale files

https://github.com/fs/rails-base/issues/174
@timurvafin, @airatshigapov advised me to structure the file, also as according to the <a href="http://stackoverflow.com/questions/10282857/how-do-you-structure-i18n-yaml-files-in-rails">link</a>. We group the translations so that you can understand where they are used