Support RSpec3
Add test tasks & multi rspec version gemfile
Merge pull request #15 from joker1007/support_rspec3

Support RSpec3
Version 0.1.1
Where table syntax by Refinement

this syntax support only Ruby 2.1 or later
Add RUBY_VERSION condition
Merge pull request #16 from joker1007/less_black_magic

[Suggest] Where table syntax by Refinement