Update Gemfile.lock for Heroku
Changed the sqllite version to 1.3.8
Changed the sqllite version to 1.3.7, because heroku keeps rejecting push for sqllite 1.3.8 version is not yet supported.
Changed the sqllite version to 1.3.7, the Gemfile.lock was still holding a lock on 1.3.8.
Put sqllite in development group and excluded development from bundle install.
Added Ruby version 1.9.3 as an added measure