simple popup templates with no styling; 

Couldn't add i18n translations due to rubygems outage this evening :(.

Sure these popups are 100% Krakow specific, but I guess there is no point to going too general right now. Still, they will help us with further development as they show what's inside the features downloaded from the server.
You convinced me :) What is more the way how popup appears will change after we will introduce nice layout (maybe we will not have popups at all but dynamic content in one column).