print each console log

```sh
$ cat .paraduct.yml
script: ./script/build_success.sh
work_dir: tmp/paraduct_workspace
variables:
  ruby:
    - 1.9.3
    - 2.0.0
    - 2.1.2
  database:
    - mysql
    - postgresql
  rails:
    - 3.2.0
    - 4.0.0
    - 4.1.0

$ bundle exec ../bin/paraduct
======================================================
START matrix test
params: {"ruby"=>"1.9.3", "database"=>"mysql", "rails"=>"3.2.0"}
params: {"ruby"=>"1.9.3", "database"=>"mysql", "rails"=>"4.0.0"}
params: {"ruby"=>"1.9.3", "database"=>"mysql", "rails"=>"4.1.0"}
params: {"ruby"=>"1.9.3", "database"=>"postgresql", "rails"=>"3.2.0"}
params: {"ruby"=>"1.9.3", "database"=>"postgresql", "rails"=>"4.0.0"}
params: {"ruby"=>"1.9.3", "database"=>"postgresql", "rails"=>"4.1.0"}
params: {"ruby"=>"2.0.0", "database"=>"mysql", "rails"=>"3.2.0"}
params: {"ruby"=>"2.0.0", "database"=>"mysql", "rails"=>"4.0.0"}
params: {"ruby"=>"2.0.0", "database"=>"mysql", "rails"=>"4.1.0"}
params: {"ruby"=>"2.0.0", "database"=>"postgresql", "rails"=>"3.2.0"}
params: {"ruby"=>"2.0.0", "database"=>"postgresql", "rails"=>"4.0.0"}
params: {"ruby"=>"2.0.0", "database"=>"postgresql", "rails"=>"4.1.0"}
params: {"ruby"=>"2.1.2", "database"=>"mysql", "rails"=>"3.2.0"}
params: {"ruby"=>"2.1.2", "database"=>"mysql", "rails"=>"4.0.0"}
params: {"ruby"=>"2.1.2", "database"=>"mysql", "rails"=>"4.1.0"}
params: {"ruby"=>"2.1.2", "database"=>"postgresql", "rails"=>"3.2.0"}
params: {"ruby"=>"2.1.2", "database"=>"postgresql", "rails"=>"4.0.0"}
params: {"ruby"=>"2.1.2", "database"=>"postgresql", "rails"=>"4.1.0"}
======================================================
params: {"ruby"=>"2.0.0", "database"=>"mysql", "rails"=>"4.1.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_2.0.0_DATABASE_mysql_RAILS_4.1.0

RUBY=2.0.0
DATABASE=mysql

======================================================
params: {"ruby"=>"1.9.3", "database"=>"mysql", "rails"=>"4.0.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_1.9.3_DATABASE_mysql_RAILS_4.0.0

RUBY=1.9.3
DATABASE=mysql

======================================================
params: {"ruby"=>"1.9.3", "database"=>"mysql", "rails"=>"4.1.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_1.9.3_DATABASE_mysql_RAILS_4.1.0

RUBY=1.9.3
DATABASE=mysql

======================================================
params: {"ruby"=>"2.1.2", "database"=>"postgresql", "rails"=>"4.0.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_2.1.2_DATABASE_postgresql_RAILS_4.0.0

RUBY=2.1.2
DATABASE=postgresql

======================================================
params: {"ruby"=>"2.1.2", "database"=>"mysql", "rails"=>"4.1.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_2.1.2_DATABASE_mysql_RAILS_4.1.0

RUBY=2.1.2
DATABASE=mysql

======================================================
params: {"ruby"=>"2.0.0", "database"=>"postgresql", "rails"=>"4.1.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_2.0.0_DATABASE_postgresql_RAILS_4.1.0

RUBY=2.0.0
DATABASE=postgresql

======================================================
params: {"ruby"=>"1.9.3", "database"=>"postgresql", "rails"=>"4.1.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_1.9.3_DATABASE_postgresql_RAILS_4.1.0

RUBY=1.9.3
DATABASE=postgresql

======================================================
params: {"ruby"=>"2.0.0", "database"=>"mysql", "rails"=>"4.0.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_2.0.0_DATABASE_mysql_RAILS_4.0.0

RUBY=2.0.0
DATABASE=mysql

======================================================
params: {"ruby"=>"2.1.2", "database"=>"postgresql", "rails"=>"4.1.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_2.1.2_DATABASE_postgresql_RAILS_4.1.0

RUBY=2.1.2
DATABASE=postgresql

======================================================
params: {"ruby"=>"2.1.2", "database"=>"postgresql", "rails"=>"3.2.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_2.1.2_DATABASE_postgresql_RAILS_3.2.0

RUBY=2.1.2
DATABASE=postgresql

======================================================
params: {"ruby"=>"1.9.3", "database"=>"postgresql", "rails"=>"3.2.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_1.9.3_DATABASE_postgresql_RAILS_3.2.0

RUBY=1.9.3
DATABASE=postgresql

======================================================
params: {"ruby"=>"2.1.2", "database"=>"mysql", "rails"=>"3.2.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_2.1.2_DATABASE_mysql_RAILS_3.2.0

RUBY=2.1.2
DATABASE=mysql

======================================================
params: {"ruby"=>"2.0.0", "database"=>"postgresql", "rails"=>"4.0.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_2.0.0_DATABASE_postgresql_RAILS_4.0.0

RUBY=2.0.0
DATABASE=postgresql

======================================================
params: {"ruby"=>"2.0.0", "database"=>"mysql", "rails"=>"3.2.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_2.0.0_DATABASE_mysql_RAILS_3.2.0

RUBY=2.0.0
DATABASE=mysql

======================================================
params: {"ruby"=>"1.9.3", "database"=>"mysql", "rails"=>"3.2.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_1.9.3_DATABASE_mysql_RAILS_3.2.0

RUBY=1.9.3
DATABASE=mysql

======================================================
params: {"ruby"=>"1.9.3", "database"=>"postgresql", "rails"=>"4.0.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_1.9.3_DATABASE_postgresql_RAILS_4.0.0

RUBY=1.9.3
DATABASE=postgresql

======================================================
params: {"ruby"=>"2.0.0", "database"=>"postgresql", "rails"=>"3.2.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_2.0.0_DATABASE_postgresql_RAILS_3.2.0

RUBY=2.0.0
DATABASE=postgresql

======================================================
params: {"ruby"=>"2.1.2", "database"=>"mysql", "rails"=>"4.0.0"}
job_dir: /Users/sueyoshi_go/workspace/github.com/sue445/paraduct/spec/tmp/paraduct_workspace/RUBY_2.1.2_DATABASE_mysql_RAILS_4.0.0

RUBY=2.1.2
DATABASE=mysql
```