add emitLater/doneLater in readme
Merge pull request #26 from dead-horse/readme

emitLater / doneLater 文档
发布0.2.4，添加doneLater, emitLater。
添加version badge
Fix doneLater bug
Merge pull request #28 from JacksonTian/fix_done

Fix doneLater bug
Bump package version for 0.2.5 release
Update README.md
support component
Merge pull request #29 from fengmk2/component

support component
let test-component run on travis ci
Merge pull request #30 from fengmk2/component-travis-ci

Let test-component run on travis ci