Added en translation for Ellipsis (#1210)

* Added en translation

* Remove dots in description

* Fix chinese doc title

* lowercase description

* Updated and added demo translation

src/components/Ellipsis/demo/line.md

 ---
 order: 1
-title: 按照行数省略
+title: 
+  zh-CN: 按照行数省略
+  en-US: Truncate according to the number of rows
 ---
 
+## zh-CN
+
 通过设置 `lines` 属性指定最大行数，如果超过这个行数的文本会自动截取。但是在这种模式下所有 `children` 将会被转换成纯文本。
 
 并且注意在这种模式下，外容器需要有指定的宽度（或设置自身宽度）。
 
+## en-US
+
+`lines` attribute specifies the maximum number of rows where the text will automatically be truncated when exceeded. In this mode, all children will be converted to plain text.
+
+Also note that, in this mode, the outer container needs to have a specified width (or set its own width).
+
+
 ````jsx
 import Ellipsis from 'ant-design-pro/lib/Ellipsis';
 

src/components/Ellipsis/demo/number.md

 ---
 order: 0
-title: 按照字符数省略 
+title: 
+  zh-CN: 按照字符数省略
+  en-US: Truncate according to the number of character
 ---
 
+## zh-CN
+
 通过设置 `length` 属性指定文本最长长度，如果超过这个长度会自动截取。
 
+## en-US
+
+`length` attribute specifies the maximum length where the text will automatically be truncated when exceeded.
+
 ````jsx
 import Ellipsis from 'ant-design-pro/lib/Ellipsis';
 

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

+---
+title: Ellipsis 
+cols: 1
+order: 10
+---
+
+When the text is too long, the Ellipsis automatically shortens it according to its length or the maximum number of lines.
+
+## API
+
+Property | Description | Type | Default
+----|------|-----|------
+tooltip | tooltip for showing the full text content when hovering over | boolean | -
+length | 	maximum number of characters in the text before being truncated | number | -
+lines | maximum number of rows in the text before being truncated | number | `1`

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

 ---
-title:
-  en-US: Ellipsis 
-  zh-CN: Ellipsis
+title: Ellipsis
 subtitle: 文本自动省略号
 cols: 1
 order: 10