Merge pull request #28 from xx45/dev

update

ReadMe.md

@@ -1,6 +1,29 @@
-# dayjs
+<p align="center"><a href="#" target="_blank" rel="noopener noreferrer"><img width="550"
+                                                                             src="https://user-images.githubusercontent.com/17680888/39081119-3057bbe2-456e-11e8-862c-646133ad4b43.png"
+                                                                             alt="Day.js"></a></p>
+<p align="center">Fast <b>2kB</b> alternative to Moment.js with the same modern API</p>
+<br>
+<p align="center">
+    <a href="https://unpkg.com/dayjs/dist/dayjs.min.js"><img
+            src="http://img.badgesize.io/https://unpkg.com/dayjs/dist/dayjs.min.js?compression=gzip&style=flat-square"
+            alt="Gzip Size"></a>
+    <a href="https://www.npmjs.com/package/dayjs"><img src="https://img.shields.io/npm/v/dayjs.svg?style=flat-square"
+                                                       alt="NPM Version"></a>
+    <a href="https://travis-ci.org/xx45/dayjs"><img
+            src="https://img.shields.io/travis/xx45/dayjs/master.svg?style=flat-square" alt="Build Status"></a>
+    <a href="https://codecov.io/gh/xx45/dayjs"><img
+            src="https://img.shields.io/codecov/c/github/xx45/dayjs/master.svg?style=flat-square" alt="Codecov"></a>
+    <a href="https://github.com/xx45/dayjs/blob/master/LICENSE"><img
+            src="https://img.shields.io/npm/l/dayjs.svg?style=flat-square" alt="License"></a>
+</p>
 
-[![NPM version](https://img.shields.io/npm/v/dayjs.svg?style=flat-square)](https://www.npmjs.com/package/dayjs)
-[![Build Status](https://img.shields.io/travis/xx45/dayjs/master.svg?style=flat-square)](https://travis-ci.org/xx45/dayjs)
-[![Codecov](https://img.shields.io/codecov/c/github/xx45/dayjs/master.svg?style=flat-square)](https://codecov.io/gh/xx45/dayjs)
-[![License](https://img.shields.io/npm/l/dayjs.svg?style=flat-square)](https://github.com/xx45/dayjs/blob/master/LICENSE)
+> Day.js is a minimalist JavaScript library for modern browsers with a largely Moment.js-compatible API. If you use Moment.js, you already know how to use Day.js.
+
+- Familiar Moment.js API & patterns
+- Immutable
+- Chainable
+- All browsers support
+---
+## License
+
+MIT