add license and issue_template

.github/CONTRIBUTING.md

@@ -0,0 +1,43 @@
+# Vant Contributing Guide
+
+## 开发环境
+
+当你克隆好仓库后，运行：
+
+```shell
+yarn || npm i
+```
+
+### 常用的npm scripts
+
+```shell
+# watch和自动build，并启动一个静态服务器
+$ npm run dev
+
+# 代码规范校验
+$ npm run lint
+
+# unit test watch
+$ npm run test:watch
+
+# test
+$ npm run test
+
+# 打包
+$ npm run dist
+
+# gh-pages分支deploy
+$ npm run deploy
+```
+
+### 项目目录结构
+
+- build：打包配置
+- docs：文档目录
+  - examples-dist：手机端md文件，自动生成，请勿改动
+  - examples-docs：PC端文档md文件
+  - src：文档页项目代码
+- lib：打包后生成的文件
+- packages：组件目录，每个组件是一个目录
+- src：主文件以及一些公用的`mixins`和`utils`
+- test：测试用例

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,11 @@
+### 请认真写 PR 的标题，会用于生成 change log。
+
+**Do you want to request a *feature* or report a *bug*?**
+
+**What is the current behavior?**
+
+**If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via https://jsfiddle.net or similar (template: https://jsfiddle.net/n879nke7/).**
+
+**What is the expected behavior?**
+
+**Which versions of Vant and Vue, and which browser / OS are affected by this issue? Did this work in previous versions of Vant?**

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,24 @@
+### Before submitting a pull request, please make sure the following is done:
+
+### 提交 PR 前请确保完成以下内容:
+
+1. Fork [the repository](https://github.com/youzan/vant) and create your branch from `master`.
+2. Follow the [contributing guide](./CONTRIBUTING.md) to setup your develop environment.
+2. If you've added code that should be tested, add tests!
+3. If you've changed APIs, update the documentation.
+4. Ensure the test suite passes (`npm test`).
+5. Make sure your code lints (`npm run lint`).
+6. Describe your pull request.
+
+### 请认真写 PR 的标题，会用于生成 change log。
+
+### Please remove the above lines when you submit this pull request, also please fill in the changes you've made in this pull request.
+
+### 提交 PR 前 请把以上内容删除，并填写以下内容。
+
+Fixes #xx(issue number here), remove this line if no related issue.
+
+Changes you made in this pull request:
+
+- some change
+- another change