Merge pull request #41 from yesmeck/master

增加一个的 type 设置
Revert "增加一个的 type 设置"
Merge pull request #43 from huacnlee/revert-41-master

Revert "增加一个的 type 设置"
update travis
.
travis add 2.1.3
invoke self.class.name in class_eval
Add more tests for STI support
rename type to class_name
destroy all Admin and Company after test