distance_of_time_in_words hardcoded strings should be separated for easier localization

Hi everybody.
After DHHs talk at RailsConf yesterday, it's essential that some of
you can rectify this patch for ruby on Rails

Please help me an have a look at

http://dev.rubyonrails.org/ticket/9587
Thanks!

Jesper Rønn-Jensen
blog: www.justaddwater.dk