Translated the document of the Login component. (#953)

* Translated the md files of Login component and the validation messages.

* Rename index.md to index.en-US.md

* Restored the Chinese version and renamed it

* Updated according to review

* Fixed all the typos

src/components/Login/demo/basic.md

 ---
 order: 0
-title: Standard Login
+title:
+  zh-CN: 标准登录
+  en-US: Standard Login
 ---
 
-支持账号密码及手机号登录两种模式。
+Support login with account and mobile number.
 
 ````jsx
 import Login from 'ant-design-pro/lib/Login';
@@ -26,7 +28,7 @@ class LoginDemo extends React.Component {
         if (!err && (values.username !== 'admin' || values.password !== '888888')) {
           setTimeout(() => {
             this.setState({
-              notice: '账号或密码错误！',
+              notice: 'The combination of username and password is incorrect!',
             });
           }, 500);
         }
@@ -50,7 +52,7 @@ class LoginDemo extends React.Component {
         onTabChange={this.onTabChange}
         onSubmit={this.onSubmit}
       >
-        <Tab key="tab1" tab="账号密码登录">
+        <Tab key="tab1" tab="Account">
           {
             this.state.notice &&
             <Alert style={{ marginBottom: 24 }} message={this.state.notice} type="error" showIcon closable />
@@ -58,21 +60,21 @@ class LoginDemo extends React.Component {
           <UserName name="username" />
           <Password name="password" />
         </Tab>
-        <Tab key="tab2" tab="手机号登录">
+        <Tab key="tab2" tab="Mobile">
           <Mobile name="mobile" />
           <Captcha onGetCaptcha={() => console.log('Get captcha!')} name="captcha" />
         </Tab>
         <div>
-          <Checkbox checked={this.state.autoLogin} onChange={this.changeAutoLogin}>自动登录</Checkbox>
-          <a style={{ float: 'right' }} href="">忘记密码</a>
+          <Checkbox checked={this.state.autoLogin} onChange={this.changeAutoLogin}>Keep me logged in</Checkbox>
+          <a style={{ float: 'right' }} href="">Forgot password</a>
         </div>
-        <Submit>登录</Submit>
+        <Submit>Login</Submit>
         <div>
-          其他登录方式
+          Other login methods
           <span className="icon icon-alipay" />
           <span className="icon icon-taobao" />
           <span className="icon icon-weibo" />
-          <a style={{ float: 'right' }} href="">注册账户</a>
+          <a style={{ float: 'right' }} href="">Register</a>
         </div>
       </Login>
     );

src/components/Login/index.en-US.md

+---
+title: Login
+cols: 1
+order: 15
+---
+
+Support multiple common ways of login with built-in controls. You can choose your own combinations and use with your custom controls.
+
+## API
+
+### Login
+
+Property | Description | Type | Default
+----|------|-----|------
+defaultActiveKey | default key to activate the tab panel | String | -
+onTabChange | callback on changing tabs | (key) => void | -
+onSubmit | callback on submit | (err, values) => void | -
+
+### Login.Tab
+
+Property | Description | Type | Default
+----|------|-----|------
+key | key of the tab | String | -
+tab | displayed text of the tab | ReactNode | -
+
+### Login.UserName
+
+Property | Description | Type | Default
+----|------|-----|------
+name | name of the control, also the key of the submitted data | String | -
+rules | validation rules, same with [option.rules](getFieldDecorator(id, options)) in Form getFieldDecorator(id, options) | object[] | -
+
+Apart from the above properties, Login.Username also support all properties of antd.Input, together with the default values of basic settings, such as _placeholder_, _size_ and _prefix_. All of these default values can be over-written.
+
+### Login.Password, Login.Mobile are the same as Login.UserName
+
+### Login.Captcha
+
+Property | Description | Type | Default
+----|------|-----|------
+onGetCaptcha | callback on getting a new Captcha | () => void | -
+
+Apart from the above properties, _Login.Captcha_ support the same properties with _Login.UserName_.
+
+### Login.Submit
+
+Support all properties of _antd.Button_.
\ No newline at end of file

src/components/Login/index.md → src/components/Login/index.zh-CN.md

 ---
-title:
-  en-US: Login
-  zh-CN: Login
+title: Login
 subtitle: 登录
 cols: 1
 order: 15
@@ -48,4 +46,3 @@ onGetCaptcha | 点击获取校验码的回调 | () => void | -
 ### Login.Submit
 
 支持 antd.Button 的所有属性。
-

src/components/Login/map.js

@@ -11,7 +11,7 @@ const map = {
       placeholder: 'admin',
     },
     rules: [{
-      required: true, message: '请输入账户名！',
+      required: true, message: 'Please enter username!',
     }],
   },
   Password: {
@@ -23,7 +23,7 @@ const map = {
       placeholder: '888888',
     },
     rules: [{
-      required: true, message: '请输入密码！',
+      required: true, message: 'Please enter password!',
     }],
   },
   Mobile: {
@@ -31,12 +31,12 @@ const map = {
     props: {
       size: 'large',
       prefix: <Icon type="mobile" className={styles.prefixIcon} />,
-      placeholder: '手机号',
+      placeholder: 'mobile number',
     },
     rules: [{
-      required: true, message: '请输入手机号！',
+      required: true, message: 'Please enter mobile number!',
     }, {
-      pattern: /^1\d{10}$/, message: '手机号格式错误！',
+      pattern: /^1\d{10}$/, message: 'Wrong mobile number format!',
     }],
   },
   Captcha: {
@@ -44,10 +44,10 @@ const map = {
     props: {
       size: 'large',
       prefix: <Icon type="mail" className={styles.prefixIcon} />,
-      placeholder: '验证码',
+      placeholder: 'captcha',
     },
     rules: [{
-      required: true, message: '请输入验证码！',
+      required: true, message: 'Please enter Captcha!',
     }],
   },
 };