modify yahoo scraping path
Merge pull request #1 from naoto/fix_yahoo_scraping

modify yahoo scraping path
Add contributing
refactoring
Merge pull request #2 from naoto/refactor

refactoring
Update gemspec
Update README.md
add wercker.yml
remove script
use Ruby 2.0
add rspec test of core library
Merge pull request #3 from naoto/add_test

add rspec test of core library
add travis.yml
add travis-ci badge
change test library
Naoto-san is collaborater.
modify travis test command
Merge pull request #4 from Kazuma/minitest

テストライブラリは rspec と minitest どっちがいい？