Merge pull request #1 from heavymery/develop

Develop
Merge pull request #2 from heavymery/develop

Update Gruntfile.js, README.md
Merge pull request #3 from heavymery/develop

Update comments (Japanese to English)
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Update README.md