Calagator "master" switches to Ruby on Rails 3, no more "rails_3" branch, and future of "with_ruby192" branch

[Igal Koshevoy]

We started Calagator nearly four years ago using Ruby on Rails 2.0.2. Today, the "master" branch used for development switches from Ruby on Rails 2.x to Rails 3.x, specifically 3.0.10. I've been running this new code on the calagator.org server for a week and everything has been fine. I'm pleased that despite all the code we changed, our testing caught everything, so there haven't been any surprises. 

I merged the "rails_3" branch into the "master" branch, and deleted the obsoleted "rails_3" branch.

Next, I plan to switch the calagator.org server to the "with_ruby192" branch soon, which adds complete support for Ruby 1.9.2 and the PostgreSQL database. Once I'm confident that we've caught all the surprises, I'll merge this into the "master", probably late next week.

-igal