add database setup for Travis-CI
make database setup more verbose
add flag to echo
run database setup as before_script

Based on http://matthew.mceachen.us/blog/how-to-test-your-rails-application-with-travis-ci-on-different-databases-engines-1220.html
add APP_RAKEFILE to root Rakefile
remove db:test:prepare
Merge branch 'fix_rails3_travis_ci' into localize_flash_msgs