Fixed coveralls.io icon.
Merge pull request #175 from xsoameix/feature/steps-bar-of-bill-coverage

Fixed coveralls.io icon.
improve readme.
update Coverage Status
Merge pull request #176 from appleboy/patch-1

improve readme.
Resolved problem of 復議/覆議.
Merge pull request #178 from xsoameix/feature/steps-bar-of-bill-coverage

Resolved problem of 復議/覆議.