Update README.rdoc [ci skip]

Remove the todo about RSpec
Support Ruby 2.1.0 and unsupport 1.9.3
Add missing 'rake db:migrate' to try
Merge pull request #50 from kaznum/update_readme

Update README.rdoc [ci skip]
Fix comparison value type
Remove unnecessary line
Merge pull request #51 from irasally/fix-same-type-of-value

Ruby2.1.0でspecが通らない箇所の対応
Add project dup_deep specs.
Add category dup_deep specs.
Add sub_category dup_deep specs.
Add story dup_deep specs.
Fix grouping of specs
Merge pull request #52 from irasally/deep-copy-specs

プロジェクト複製テストを追加